Programming Point

The while loop in C language is used to iterate the part of program or statements many times.
In while loop, condition is given before the statement.
So it is different from the do while loop.
It can execute the statements 0 or more times.

The C language while loop should be used if number of iteration is uncertain or unknown.

The syntax of while loop in c language is given below:

while(condition)
{
//code to be executed
}

Program to print table for the given number using while loop in C

#include <stdio.h>
#include<conio.h>
void main()
{
int i=1,number=0;
clrscr();

printf("Enter a number: ");
scanf("%d",&number);

while(i<=10)
{
printf("%d \n",(number*i));
i++;
}

getch();
}
Output
Enter a number: 50
50
100
150
200
250
300
350
400
450
500

If you pass 1 as a expression in while loop, it will run infinite number of times.

while(1)
{
//statement
}