# C program to calculate simple and compound interest

This C program takes principal amount, yearly rate, and time as input, then calculates the simple interest and compound interest for the same data and prints them.

Basic Mathematics:

Formula for simple interest:

SI= P x R x T ÷ 100

Where,
SI= Simple Interest ,
P = Principal,
R = Rate of interest,
T = Time period of the Loan/deposit in years.

Formula for compound interest:

A = P(1 + r/n)nt

Where,
A = Accrued Amount (principal + interest)
P = Principal Amount
I = Interest Amount
R = Annual Nominal Interest Rate in percent
r = Annual Nominal Interest Rate as a decimal
r = R/100
t = Time Involved in years, 0.5 years is calculated as 6 months, etc.
n = number of compounding periods per unit t; at the END of each period

Program: Calculate simple and compound interest using C

Output: Calculates and prints simple and compound interest

``````Enter principal amount: 25000

Enter the yearly rate: 8

Enter the time in years: 3

Simple interest= 6000.00
Compound interest= 6492.80``````

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