# C++ Program to calculate Simple Interest

In this post, we will be learning how to write a C++ Program to Calculate Simple Interest of the given values of Principle, Time and Rate.

### The formula to Calculate Simple Interest

To calculate S.I, we have a formula:-

S.I = (P*R*T)/100
Where,
S.I represents Simple Interest,
P represents Principle,
R represents Rate (annually),
T represents Time (in years).

### Code:-

```#include <iostream>

using namespace std;

int main()
{
float p;
float r;
float t;
// Taking an input for principle
cout << "Enter the principle: ";
cin >> p;
// Taking an input for rate per year
cout << "Enter the rate: ";
cin >> r;
// Taking an input for time
cout << "Enter the time(In Year): ";
cin >> t;
// formula for S.I. is (p*r*t)/100
float si = (p*r*t)/100;

// printing the simple interest
cout << "The Simple Interest is "  << si << endl;

return 0;
}```

### Output:-

Enter the principle: 500 Enter the rate: 5 Enter the time(In Year): 3 The Simple Interest is 75

### You can learn about many other C++ Programs Here.

#### Best Books for learning C++ programming language with Data Structure and Algorithms.

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#### Amit Rawat

Founder and Developer at SpiderLabWeb
I love to work on new projects and also work on my ideas. My main field of interest is Web Development.