Example: C Program to Calculate Simple Interest using While loop

C
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// C Program to Calculate Simple Interest using While loop
#include <stdio.h>

int main() {
    float x = 1, y, SI;
    // `SI` = value of the simple interest

    printf("Enter the principal (amount), time, and rate::\n");

    int count = 1;
    while (count <= 3) {
        scanf("%f", &y);

        // It will calculate the value of simple interest
        x *= y;
        if (count == 3)
            SI = x/100;

        count++;
    }

    // It will produce the final output
    printf("\nSimple Interest = %.2f\n", SI);
    return 0;
}