What is the logical operator in C?

640. What is the bitwise operator in C?

Answer:

Bitwise operators are used to perform bit operations. Decimal values are converted into binary values which are the sequence of bits and bit wise operators work on these bits.
Bit wise operators in C language are & (bitwise AND), | (bitwise OR), ~ (bitwise OR), ^ (XOR), << (left shift) and >> (right shift).

# Tutorial: Bit-wise Operators in C

Question: Operators and Enums in C Language Short

641. What are all decision control statements in C?

Answer:

There are 3 types of decision making control statements in C language. They are,

if statements
if else statements
nested if statements

# Tutorial: Decision Making in C Introduction

Question: Decision Making of C Language Short

642. What are all loop control statements in C?

Answer:

Loop control statements in C are used to perform looping operations until the given condition is true. Control comes out of the loop statements once condition becomes false.
There are 3 types of loop control statements in C language. They are,

for
while
do-while

# Tutorial: Loop Introduction in C

Question: Loop control in C Language Short

643. What is the difference between while and do-while loops in C?

Answer:

While loop is executed only when given condition is true.
Whereas, do-while loop is executed for first time irrespective of the condition. After executing while loop for first time, then condition is checked.

# Tutorial: do while Loop In C

Question: Loop control in C Language Short

644. What is the difference between pre increment operator and post increment operator?

Answer:

Pre increment operator is used to increment variable value by 1 before assigning the value to the variable.
Post increment operator is used to increment variable value by 1 after assigning the value to the variable.

# Tutorial: Assignment Operators in C

Question: Operators and Enums in C Language Short

645. What is the difference between pre decrement operator and post decrement operator?

Answer:

Pre decrement operator is used to decrement variable value by 1 before assigning the value to the variable.
Post decrement operator is used to decrement variable value by 1 after assigning the value to the variable.

# Tutorial: Assignment Operators in C

Question: Operators and Enums in C Language Short

646. What is & and * operators in C?

Answer:

* Operator is used as pointer to a variable. Example: * a where * is pointer to the variable a.
& operator is used to get the address of the variable. Example: &a will give address of a.

Explanation

The "&" operator in C is the "address of" operator. It is used to obtain the memory address of a variable. For example, if you have an integer variable "x" and you want to know its memory address, you would use "&x".

The "*" operator in C is the "dereference" operator. It is used to obtain the value stored at a memory address. For example, if you have a pointer variable "p" that points to an integer and you want to know the value stored at that memory address, you would use "*p". This operator is also used in pointer declaration and function argument.

Practical Example

The address-of operator (&) in C is used to get the memory address of a variable. Here is an example:


#include <stdio.h>

int main() {
    int x = 5;
    printf("The memory address of x is: %p\n", &x);
    return 0;
}

In this example, the variable x is initialized with the value of 5, and the address of x is printed using the address-of operator and the %p format specifier. The output would be something like "The memory address of x is: 0x7ffc6f9a6b24"

The dereference operator * in C is used to get the value stored at a memory address. Here is an example:


#include <stdio.h>

int main() {
    int x = 5;
    int *ptr = &x;
    printf("The value of x is: %d\n", *ptr);
    return 0;
}

In this example, the variable x is initialized with the value of 5, the memory address of x is stored in ptr and finally, the value stored at the memory address of x is printed using the dereference operator * and the %d format specifier. The output would be something like "The value of x is: 5"

# Tutorial: Introduction to Operator

Question: Operators and Enums in C Language Short

647. What will happen if break statement is not used in switch case in C?

Answer:

Switch case statements are used to execute only specific case statements based on the switch expression.
If we do not use break statement at the end of each case, program will execute all consecutive case statements until it finds next break statement or till the end of switch case block.

If a break statement is not used in a switch case in C, the code will continue to execute the following cases until a break or the end of the switch statement is reached. This can lead to unexpected results, as multiple cases may be executed even if only one case is intended to be executed. It is important to use the break statement in each case to ensure that only the intended case is executed and to avoid fall-through.

Example

If the break statement is not used in a switch case in C, the code will continue to execute the next case statement(s) after a match is found.

For example:


switch (x) {
    case 1: 
        printf("Case 1");
    case 2: 
        printf("Case 2");
    case 3: 
        printf("Case 3");
}

If the value of x is 1, the output will be "Case 1Case 2Case 3". This is because after the first match, the code continues to execute the next case statements, instead of breaking out of the switch statement with the use of the break statement.

To avoid this problem, the break statement should be used at the end of each case block.


switch (x) {
    case 1: 
        printf("Case 1");
        break;
    case 2: 
        printf("Case 2");
        break;
    case 3: 
        printf("Case 3");
        break;
}

This way, when the program reaches the matching case, it will break out of the switch statement and will not execute any other cases.

# Tutorial: switch case

Question: Decision Making of C Language Short

648. Why is default statement used in switch case in C?

Answer:

Switch case statements are used to execute only specific case statements based on the switch expression. If switch expression does not match with any case, default statements are executed by the program.

The default statement in a switch case in C is used as a catch-all for any cases that are not explicitly handled by the other case statements. It is typically used to handle unexpected input or to provide a default behavior for the switch statement. The code block associated with the default statement is executed when no other case statement's value matches the expression being evaluated.

Example


int x = 3;

switch (x) {
    case 1:
        printf("x is 1");
        break;
    case 2:
        printf("x is 2");
        break;
    default:
        printf("x is not 1 or 2");
        break;
}

In this example, if x=3 which is not handled by any of the case statement, the default statement will be executed.

# Tutorial: switch case

Question: Decision Making of C Language Short

649. What is the use of goto statement?

Answer:

goto statement is used to transfer the normal flow of a program to the specified label in the program. Below is the syntax for goto statement in C.


{
                  </div>
                </div>
                        <div class="d-flex w-100 justify-content-between">
                <a style="color:#9e9d9d;" href="/tutorial/goto-statement-in-c/1/200">
                    <small># Tutorial: goto Statement in C</small> 
                </a>
            </div>
           
                        <a style="color:#9e9d9d;" href="/qa/-/1/45">
                <small><i class="fa fa-code" aria-hidden="true"></i> Question: Control Flow in C Programming </small>
            </a>
                                   <span class="float-end" style="color:#9e9d9d"> <small><i class="fa fa-check" aria-hidden="true"></i> Short </small></span>  
                            </div>
      
                                    <li class="list-group-item d-flex justify-content-between align-items-center main-gradient-tutorials mb-2"><a href="http://www.atnyla.com/overview-of-java-language/0/2"><i class="fa fa-code" aria-hidden="true"></i> Chapterwise Java Program</a></li>
                                <li class="list-group-item d-flex justify-content-between align-items-center main-gradient-tutorials mb-2"><a href="http://www.atnyla.com/fundamentals-of-c-language/1/20"><i class="fa fa-code" aria-hidden="true"></i> Chapterwise C Program</a></li>
                                <li class="list-group-item d-flex justify-content-between align-items-center main-gradient-tutorials mb-2"><a href="http://www.atnyla.com/array/3/54"><i class="fa fa-code" aria-hidden="true"></i> Chapterwise Data Structure Program</a></li>
                            </ul>
                      <br>
                      
                  
                   </div>
 </div>
 
</div>
 </div> 
 </div>
 </div>
 </div>
<button onclick="topFunction()" id="myBtn" title="Go to top">Top</button>
<style>
         
 #myBtn {
  display: none; /* Hidden by default */
  position: fixed; /* Fixed/sticky position */
  bottom: 20px; /* Place the button at the bottom of the page */
  right: 30px; /* Place the button 30px from the right */
  z-index: 99; /* Make sure it does not overlap */
  border: none; /* Remove borders */
  outline: none; /* Remove outline */
  background-color: blue; /* Set a background color */
  background-color: transparent;
  box-shadow: 0 6px 6px rgba(0, 0, 0, 0.6);
  color: white; /* Text color */
  cursor: pointer; /* Add a mouse pointer on hover */
  padding: 15px; /* Some padding */
  border-radius: 10px; /* Rounded corners */
  font-size: 18px; /* Increase font size */
  border-radius: 50%;
}

#myBtn:hover {
  background-color: #00a7f5; /* Add a dark-grey background on hover */
}
</style>
     
<script>
// Get the button:
let mybutton = document.getElementById("myBtn");

// When the user scrolls down 20px from the top of the document, show the button
window.onscroll = function() {scrollFunction()};

function scrollFunction() {
  if (document.body.scrollTop > 20 || document.documentElement.scrollTop > 20) {
    mybutton.style.display = "block";
  } else {
    mybutton.style.display = "none";
  }
}

// When the user clicks on the button, scroll to the top of the document
function topFunction() {
  document.body.scrollTop = 0; // For Safari
  document.documentElement.scrollTop = 0; // For Chrome, Firefox, IE and Opera
}
</script> 

<footer id="footer" style = "background: linear-gradient(to right, #1a2980, #26d0ce); margin-top: 10px;" class = "text-white p-3"> 
    <div class="footer-top">
      <div class="container-fluid">
        <div class="row"> 
          <div class="col-lg-2 col-md-6 footer-contact text-white"> 
          </div> 
          <div class="col-lg-3 col-md-6 footer-links text-white">
            <p style="font-size: 16px; color: white;">Useful Links</p>
            <ul>
              <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/" class = "text-white">Home</a></li>
              <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/about/" class = "text-white">About us</a></li> 
              <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/terms-and-conditions/" class = "text-white">Terms of service</a></li>
              <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/about/guest-post" class = "text-white">Guest Post</a></li> 
              <li><i class="bx bx-chevron-right"></i> <a href="hhttps://www.atnyla.com/about/ads/" class = "text-white">Advertisement</a></li>
            </ul>
          </div> 
          <div class="col-lg-3 col-md-6 footer-links text-white">
            <p style="font-size: 16px; color: white;">Login</p>
            <ul>
              <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/user/" class = "text-white">login</a></li>
              <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/user/" class = "text-white">Sign Up</a></li> 
            </ul>
          </div> 
          <div class="col-lg-3 col-md-6 footer-newsletter">
            <p style="font-size: 16px; color: white;">Visit All Home</p>
            <ul>
            <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/syllabus/java-programming-language/0" class = "text-white">Syllabus</a></li>
            <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/library/java-programming-language" class = "text-white">Subject</a></li>
            <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/library/" class = "text-white">Library</a></li>
            <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/gk-and-current-affairs" class = "text-white">GK/MCQ</a></li>
            <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/blog/" class = "text-white">Blog</a></li>
            <!--<p>Tamen quem nulla quae legam multos aute sint culpa legam noster magna</p>-->
            <!--<form action="" method="post">-->
            <!--  <input type="email" name="email"><input type="submit" value="Subscribe">-->
            <!--</form>-->
           </ul>
          </div> 
           <!--<div class="col-lg-2 col-md-6 footer-newsletter">-->
                <!-- <p style="font-size: 16px; color: white; ">Social Links</p>-->
                <!-- <ul> -->
                <!-- <li> <a href = "https://chat.whatsapp.com/BfdvA6k89H28bD4q4QqiaK" class="text-white">  Join Whatsapp Group  <i class="fa-brands fa-whatsapp"> </i> </a></li>-->
                <!--<li> <a href = "https://t.me/ComputerLanguageWithRumman" class="text-white">  Join Telegram Group  <i class="fa-brands fa-telegram"></i> </i> </a></li>-->
                <!--</ul>-->
            <!--</div>-->
        </div>
      </div>
    </div> 
    <div class="container d-md-flex   text-white"> 
      <div class="social-links text-center text-md-end pt-3 pt-md-0 text-white">
        <!--<a href="#" class="twitter"><i class="bx bxl-twitter"></i></a>-->
        <!--<a href="#" class="facebook"><i class="bx bxl-facebook"></i></a>-->
        <!--<a href="#" class="instagram"><i class="bx bxl-instagram"></i></a>-->
        <!--<a href="#" class="google-plus"><i class="bx bxl-skype"></i></a>-->
        <!--<a href="#" class="linkedin"><i class="bx bxl-linkedin"></i></a>-->
      </div>
    </div>
    
    <div class="me-md-auto text-center text-md-start">
        <div class="copyright text-center">
          © Copyright <strong><span>atnyla</span></strong>. All Rights Reserved
        </div>
        <div class="credits text-center"> 
          Designed by <a href="https://atnyla.com/"  style="color: white">atnyla.com</a>
        </div>
      </div> 
  </footer> 
    
<!-- Scripts -->
<!-- Bootstrap core JavaScript -->
<script src="https://atnyla.com/vendor/jquery/jquery.min.js"></script>

<script src="https://atnyla.com/vendor/bootstrap/js/bootstrap.bundle.min.js"></script>  

<script src="https://atnyla.com/assets/js/isotope.min.js"></script>  

<!--<script src=" https://unpkg.com/isotope-layout@3.0.6/dist/isotope.pkgd.min.js"></script>  -->

<script src="https://atnyla.com/assets/js/owl-carousel.js"></script>
<!--<script src="https://atnyla.com/assets/js/lightbox.js"></script>-->
<script src="https://atnyla.com/assets/js/tabs.js"></script>

<!--<script src="https://atnyla.com/assets/js/video.js"></script>-->
<!--<script src="https://atnyla.com/assets/js/slick-slider.js"></script>--> 

<script src="https://atnyla.com/assets/js/custom.js"></script> 

<!--<script src="https://cdn.jsdelivr.net/gh/google/code-prettify@master/loader/run_prettify.js"></script>-->
<!--<script src="https://cdn.jsdelivr.net/gh/google/code-prettify@master/loader/run_prettify.js?skin=desert"></script>-->

<script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script> 
<script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script> 
   
 
<script>
  //according to loftblog tut
  $(".nav li:first").addClass("active");

  var showSection = function showSection(section, isAnimate) {
    var direction = section.replace(/#/, ""),
      reqSection = $(".section").filter(
        '[data-section="' + direction + '"]'
      ),
      reqSectionPos = reqSection.offset().top - 0;

    if (isAnimate) {
      $("body, html").animate(
        {
          scrollTop: reqSectionPos,
        },
        800
      );
    } else {
      $("body, html").scrollTop(reqSectionPos);
    }
  };

  var checkSection = function checkSection() {
    $(".section").each(function () {
      var $this = $(this),
        topEdge = $this.offset().top - 80,
        bottomEdge = topEdge + $this.height(),
        wScroll = $(window).scrollTop();
      if (topEdge < wScroll && bottomEdge > wScroll) {
        var currentId = $this.data("section"),
          reqLink = $("a").filter("[href*=\\#" + currentId + "]");
        reqLink
          .closest("li")
          .addClass("active")
          .siblings()
          .removeClass("active");
      }
    });
  };

  $(".main-menu, .responsive-menu, .scroll-to-section").on(
    "click",
    "a",
    function (e) {
      e.preventDefault();
      showSection($(this).attr("href"), true);
    }
  );

  $(window).scroll(function () {
    checkSection();
  });
</script>
<script>
  $(document).ready(function () {
    $("#side-bar-toogle-btn").click(function () {
      $("#sidebar-list-group").toggle("slow");
    });
  });
</script> 
    
<script async src="https://fundingchoicesmessages.google.com/i/pub-7357847575760859?ers=1" nonce="P8qLHGFgH5IxNN3G6pLnUA"></script><script nonce="P8qLHGFgH5IxNN3G6pLnUA">(function() {function signalGooglefcPresent() {if (!window.frames['googlefcPresent']) {if (document.body) {const iframe = document.createElement('iframe'); iframe.style = 'width: 0; height: 0; border: none; z-index: -1000; left: -1000px; top: -1000px;'; iframe.style.display = 'none'; iframe.name = 'googlefcPresent'; document.body.appendChild(iframe);} else {setTimeout(signalGooglefcPresent, 0);}}}signalGooglefcPresent();})();</script>


<script src="https://cdn.rawgit.com/google/code-prettify/master/loader/run_prettify.js"></script>
<script>
// prettyPrint();
</script>
  
</body>
</html>

What is the logical operator in C?

Answer:

Join Our telegram group to ask Questions

640. What is the bitwise operator in C?

641. What are all decision control statements in C?

642. What are all loop control statements in C?

643. What is the difference between while and do-while loops in C?

644. What is the difference between pre increment operator and post increment operator?

645. What is the difference between pre decrement operator and post decrement operator?

646. What is & and * operators in C?

Explanation

Practical Example

647. What will happen if break statement is not used in switch case in C?

Example

648. Why is default statement used in switch case in C?

Example

649. What is the use of goto statement?