A while loop in C programming repeatedly executes a target statement as long as a given condition is true. While loop is additionally referred to as a pre-tested loop. In general, a long time loop allows a component of the code to be executed multiple times depending upon a given boolean condition. It are often viewed as a repeating if statement. The while loop is generally utilized in the case where the amount of iterations isn't known before. The while loop loops through a block of code as long as a specified condition is true.
Syntax of while loop in C language
Syntax
The syntax of a long time loop in C programing language is −
do {
// code block to be executed
}
while (condition);
// code block to be executed
}
while (condition);
could also be one statement or a block of statements. The condition could also be any expression, and true is any nonzero value. The loop iterates while the condition is true.
Flowchart of while loop in C
Properties of while loop
A conditional expression is employed to test the condition.
The statements defined inside the while loop will repeatedly execute until the given condition fails. o The condition are true if it returns 0. The condition are going to be false if it returns any non-zero number.
In while loop, the condition expression is compulsory.
Running ages loop without a body is feasible.
We can have quite one conditional expression in while loop.
If the loop body contains only 1 statement, then the braces are optional.
Example while loop in C
#include <stdio.h>
int main() {
int i = 0;
while (i < 10) {
printf("%d\n", i);
i++;
}
return 0;
}
Output
0
1
2
3
4
5
6
7
8
9
#include <stdio.h>
int main()
{
// initialization expression
int i = 1;
// test expression
while (i <= 10) {
printf("Hello World\n");
// update expression
i++;
}
return 0;
}
Output
Hello World
Hello World
Hello World
Hello World
Hello World
Hello World
Hello World
Hello World
Hello World
Hello World
Infinitive while loop in C
If the expression passed in while loop ends up in any non-zero value then the loop will run the infinite number of times.
While(1)
{
// Statement:
}
Example Infinitive while loop in C
#include<stdio.h>
void main ()
{
int x = 10, y = 2;
while(x+y-1)
{
printf("%d %d",x--,y--);
}
}
Output
infinite loop
