What is const pointer in C?

C Programming Language > Pointer in C Language > Pointer in C

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939

Answer:

Const pointer is a pointer that can’t change the address of the variable that is pointing to.
Once const pointer is made to point one variable, we can’t change this pointer to point to any other variable. This pointer is called const pointer.

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Answer: C is known as a mother language because most of the compilers and JVMs are written in C language. Most of the languages which are developed after C language has borrowed heavily from it like C++, Python, Rust, javascript, etc. It introduces new core concepts like arrays, functions, file handling which are used in these languages.

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720. Who is the founder of C language?

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721. When was C language developed?

Answer:

C language was developed in 1972 at bell laboratories of AT&T.

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C, computer programming language developed in the early 1970s by American computer scientist Dennis M. Ritchie at Bell Laboratories (formerly AT&T Bell Laboratories). C was designed as a minimalist language to be used in writing operating systems for minicomputers, such as the DEC PDP 7, which had very limited memories compared with the mainframe computers of the period. The language was devised during 1969

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722. What are the features of the C language?

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723. What is the use of printf() and scanf() functions?

Answer:

printf(): The printf() function is used to print the integer, character, float and string values on to the screen.

Following are the format specifier:

%d: It is a format specifier used to print an integer value.
%s: It is a format specifier used to print a string.
%c: It is a format specifier used to display a character value.
%f: It is a format specifier used to display a floating point value.

scanf(): The scanf() function is used to take input from the user.

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724. What is the difference between the local variable and global variable in C?

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725. What is the use of a static variable in C?

Answer:

Following are the uses of a static variable:

A variable which is declared as static is known as a static variable. The static variable retains its value between multiple function calls.
Static variables are used because the scope of the static variable is available in the entire program. So, we can access a static variable anywhere in the program.
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The static variable is used as a common value which is shared by all the methods.
The static variable is initialized only once in the memory heap to reduce the memory usage.

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726. What is the use of the function in C?

Answer:

Uses of C function are:

C functions are used to avoid the rewriting the same code again and again in our program.
C functions can be called any number of times from any place of our program.
When a program is divided into functions, then any part of our program can easily be tracked.
C functions provide the reusability concept, i.e., it breaks the big task into smaller tasks so that it makes the C program more understandable.

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727. What is the difference between call by value and call by reference in C?

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