Write a C program to input principle (amount), time and rate (P, T, R) from user and find Simple Interest. How to calculate simple interest in C programming. Logic to find simple interest in C program.

**Example**

**Input**

Enter principle: 1200 Enter time: 2 Enter rate: 5.4

**Output**

Simple Interest = 129.600006

## Required knowledge

Fundamentals of C, Data types, Talking user input in C

## Simple Interest formula

Formula for simple interest is given by -

Where,

P is the principle amount

T is the time and

R is the rate

## Logic to calculate simple interest

Step by step descriptive logic to calculate simple interest -

- Input principle amount in some variable say principle.
- Input time in some variable say time.
- Input rate in some variable say rate.
- Now, apply the formula to calculate simple interest i.e. SI = (principle * time * rate) / 100.
- Finally print the resultant value of SI.

## Program to calculate simple interest

/** * C program to calculate simple interest */ #include <stdio.h> int main() { float principle, time, rate, SI; // Input principle, rate and time printf("Enter principle (amount): "); scanf("%f", &principle); printf("Enter time: "); scanf("%f", &time); printf("Enter rate: "); scanf("%f", &rate); // Calculate simple interest SI = (principle * time * rate) / 100; printf("Simple Interest = %f", SI); return 0; }

Output

Enter principle (amount): 1200 Enter time: 2 Enter rate: 5.4 Simple Interest = 129.600006

Happy coding ;)

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