**Write a program in C language to calculate the simple interest. **In this article, we will write a program in c language to calculate the simple interest.

**What is simple interest?**

Simple interest is a method to calculate the amount of interest charged on a sum at a given rate and for a given period of time. and Simple interest is a quick and easy method to calculate interest on the money.

**Some useful terms in the program**

- SI = simple interest
- Formula to calculate SI : (P * R * t)/100
- where,
**P = principle ,****R =****Rate of Interest in % per annum,****T = the number of years.**

**Algorithm to calculate the simple interest**

**Start****Declare the variables.****Initialize the Variables.****Calculate the Simple Interest using ((P*R*T)/100).****Print the Simple Interest.****End.**

## Program in C to calculate the simple interest

#include<stdio.h> int main(){ float rate=5, principle=100, time=2 float si; si=(rate*principle*time)/100; printf("simple interest is %f",si); return 0; }

**Explanation of source code**

**Step 1: start.**

**Step 2: Include header files using #include.**

**Step 3: then create a main function method with the int return type.**

**Step 4: then declare the variable in float and give the respected value to it.**

**Step 5: and then create the formula of simple interest ((P*R*T*)/10).**

**Step 6: After then print with the help of the “printf()” statement. **

**Step 7: After successful completion return 0.**

**Step 8: end.**

### Output

**In this way, we create a program in C language to calculate the simple interest.**