🚀 Programming Example
do while loop in C Programming language
When the test expression is false (nonzero), the do...while loop is terminated.
// Program to add numbers until user enters zero
#include <stdio.h>
int main()
{
double number, sum = 0;
// loop body is executed at least once
do
{
printf("Enter a number: ");
scanf("%lf", &number);
sum += number;
}
while(number != 0.0);
printf("Sum = %.2lf",sum);
return 0;
}
Enter a number: 1.5
Enter a number: 2.6
Enter a number: 2.3
Enter a number: 5.6
Enter a number: 1.5
Enter a number: 0
Sum = 13.50
The code block (loop body) inside the braces is executed once.
Then, the test expression is evaluated. If the test expression is true, the loop body is executed again. This process goes on until the test expression is evaluated to 0 (false).
When the test expression is false (nonzero), the do...while loop is terminated.
First understand the algorithm carefully. Then study the program line-by-line and compare it with the output. Finally, review the explanation section to strengthen your logic and programming understanding.
Rewrite the program without looking at the code. Modify values, conditions or logic and run it again. This helps improve confidence and strengthens coding skills much faster.