for loop in Java Programming Language
Table of Content:
For Loop in Java
Loop statements are an important part of any programming language. Java for loops is very similar to Java while loops and do while loop in that it continues to process a block of code until a statement becomes false, and everything is defined in a single line. Java supplies a powerful assortment of loop constructs. A for loop has a concise syntax for writing loops.
Syntax
for (initial-action; loop-continuation-condition; action-after-each-iteration) {
// Loop body;
Statement(s);
}
for (i = initialValue; i < endValue ; i++) {
// Loop body;
Statement(s);
}
Similar Syntax while loop
i = initialValue; // Initialize loop control variable
while (i < endValue) {
// Loop body
...
i++; // Adjust loop control variable
}
Similar Syntax do while loop
i = initialValue; // Initialize loop control variable
do{
// Loop body
...
i++; // Adjust loop control variable
}while (i < endValue) ;
flowchart of the for loop
A for loop performs an initial action once, then repeatedly executes the statements in the loop body, and performs an action after an iteration when the loop-continuation-condition evaluates to true
Example of for Loop
class ForLoopExample {
public static void main(String[] args){
int i;
for (i = 0; i < 100; i++) {
System.out.println("Welcome to atnyla!");
}
}
}
Output:
Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Welcome to atnyla! Press any key to continue . . .
Example of for Loop
/*
Demonstrate the for loop.
Call this file "ForLoopExample.java".
*/
class ForLoopExample {
public static void main(String[] args) {
for(int i=1;i<=10;i++){
System.out.println(i);
}
}
}
Output:
1 2 3 4 5 6 7 8 9 10 Press any key to continue . . .
Example of for Loop
/*
Demonstrate the for loop.
Call this file "ForLoopExample.java".
*/
class ForLoopExample {
public static void main(String[] args) {
for(int x = 15; x < 25; x = x + 1) {
System.out.print("value of x : " + x );
System.out.print("\n");
}
}
}
Output:
value of x : 15 value of x : 16 value of x : 17 value of x : 18 value of x : 19 value of x : 20 value of x : 21 value of x : 22 value of x : 23 value of x : 24 Press any key to continue . . .