C Program to Calculate Simple Interest

• Write a C program to read principal amount, rate of interest and time and calculate simple interest.
• Wap in C to find simple interest.

Required Knowledge

• C printf and scanf functions
• C Arithmetic Operators

We will first read Principle amount, rate of interest and time using scanf function. We will use below mentioned formulae to calculate Simple Interest (SI).

• Simple Interest = (Principle x Rate x Time) / 100

C program to calculate simple interest

/* 
 * C program to calculate simple interest 
 */ 
   
#include <stdio.h>  
   
int main() {  
    float principle, rate, time, simpleInterest;    
   
    /* 
     * Take Principle, Rate of interest and 
     * Time as input from user.
     */ 
    printf("Enter Principle Amount\n");  
    scanf("%f", &principle);  
    printf("Enter Rate of Interest\n");  
    scanf("%f", &rate);  
    printf("Enter Time of Loan\n");  
    scanf("%f", &time);  
   
    /*
     * Simple Interest = (Principle X Rate X Time)/100;
     */ 
    simpleInterest = (principle * rate * time)/100;  
   
    printf("Simple Interest = %.2f", simpleInterest);  
   
    return 0;  
}

Output

Enter Principle Amount
10000
Enter Rate of Interest
5
Enter Time of Loan
2
Simple Interest = 1000.00