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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