🚀⚡Beginner

Find Simple Interest

Calculate simple interest

Simple Interest (SI) is a quick method to calculate the interest charged on a loan. It is calculated on the original principal only, not on accumulated interest.

📐 Formula

SI = (P × R × T) / 100

Principal Amount

Rate of Interest (%)

Time (in years)

📝 Example Calculation

P = ₹10,000, R = 5%, T = 2 years

SI = (10000 × 5 × 2) / 100 = ₹1,000

C Program to Calculate Simple Interest

simple_interest.c

1#include <stdio.h>
2
3int main() {
4    float principal, rate, time, interest;
5    
6    // Input values
7    printf("Enter Principal amount: ");
8    scanf("%f", &principal);
9    
10    printf("Enter Rate of interest (%%): ");
11    scanf("%f", &rate);
12    
13    printf("Enter Time (years): ");
14    scanf("%f", &time);
15    
16    // Calculate Simple Interest
17    interest = (principal * rate * time) / 100;
18    
19    // Display results
20    printf("\nSimple Interest = %.2f\n", interest);
21    printf("Total Amount = %.2f\n", principal + interest);
22    
23    return 0;
24}

Output

Enter Principal amount: 10000

Enter Rate of interest (%): 5

Enter Time (years): 2

Simple Interest = 1000.00

Total Amount = 11000.00

📖 Code Explanation

Code	Explanation
float principal...	Declare float variables for decimal precision
%%	Prints a literal % symbol in printf
(P * R * T) / 100	Apply the simple interest formula
%.2f	Display float with 2 decimal places