FOR LOOPS

C Programming for Loop

Loops are used in programming to repeat a specific block of code. After reading this tutorial, you will learn to create a for loop in C programming.

Loops are used in programming to repeat a specific block until some end condition is met. There are three loops in C programming:

1. for loop
2. while loop
3. do...while loop

for Loop

 The syntax of for loop is:

for (initializationStatement; testExpression; updateStatement)
{
       // codes 
}

example for loop

// Program to calculate the sum of first n natural numbers
// Positive integers 1,2,3...n are known as natural numbers

#include <stdio.h>
int main()
{
    int num, count, sum = 0;

    printf("Enter a positive integer: ");
    scanf("%d", &num);

    // for loop terminates when n is less than count
    for(count = 1; count <= num; ++count)
    {
        sum += count;
    }

    printf("Sum = %d", sum);

    return 0;
}

Output
Enter a positive integer: 10
Sum = 55