## In this Program, you’ll learn how to calculate compound Interest.

To properly understand this Program **Calculate Compound Interest** you should know the following:

- Input/Output
- Arithmetic Operator
- Data Types

Below is the formula to Calculate the Compound Interest

**Compound Interest: ***Principle * (1 + Rate / 100) ^{time}*

or

In the above formula

`P is principle amount`

R is the rate and

T is the time span

#### Logic to Calculate the Compound Interest

Step by step how to find compound interest.

- Input principle amount. Store it in some variable say principle.
- Input time in some variable say time.
- Input rate in some variable say rate.
- Calculate compound interest using the above formula.
- Finally, print the resultant value of CI.

#### Program to Calculate Compound Interest

```
#include <stdio.h>
#include <math.h>
int main()
{
float principle, rate, time, CI;
/* Input principle, time and rate */
printf("Enter principle (amount): ");
scanf("%f", &principle);
printf("Enter time: ");
scanf("%f", &time);
printf("Enter rate: ");
scanf("%f", &rate);
/* Calculate compound interest */
CI = principle* (pow((1 + rate / 100), time));
/* Print the resultant CI */
printf("Compound Interest = %f", CI);
return 0;
}
```

**Output**

```
Enter principle (amount): 1200
Enter time: 2
Enter rate: 5.4
Compound Interest = 1333.099243
```

**Note**: The `pow()`

function computes the power of a number.

This Program can be used in making application for banks and calculators.

Ask your questions about how to Calculate the Compound Interest in C and clarify your/others doubts by commenting. **Documentation**.

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