## Place Your Query

# Write a Program to Find Simple Interest and Compound Interest.

**Aim**

This type of expression-based programs are supposed to be basic c-program, where user gives some inputs like for principal amount as p, time as n years and rate of interest as r. Finally, using the mathematical formula as expression will help in** **writing a C program to find the Simple Interest and Compound Interest.

**Procedure/ Algorithm**

**Step-1:** Start the program execution.

**Step-2:** Declare the variables p, n, r.

**Step-3:** Input the values for p, n, r.

**Step-4:** Calculate and print the values of simple interest.

OR

**Step-5:** Calculate and print the values of compound interest.

**Step-6:** Stop the program execution.

## Hello WorldBlockHello World

```
// Program to calculate simple interest
#include<stdio.h>
#include<math.h>
int main()
{
int p,n;
float r;
printf("\nEnter the value of amount, number of years and Rate of interest:");
scanf("%d%d%f",&p,&n,&r);
float SI=(p*n*r)/100);
printf("\nThe simple interest is = %f",SI));
return 0;
} // end main
```

### Output

```
Enter the value of amount, number of years and Rate of interest:
100
5
4
The simple interest is = 20.000000
--------------------------------
Process exited after 8.76 seconds with return value 0
Press any key to continue . . .
```

### Program: Calculate the Compound Interest

```
// Program to calculate compound interest
#include<stdio.h>
#include<math.h>
int main()
{
int p,n;
float r;
printf("\nEnter the value of amount, number of years and Rate of interest:");
scanf("%d%d%f",&p,&n,&r);
float CI=p*pow((1+(r/100)),n)-p;
printf("\nThe compound interest is = %f",CI);
return 0;
} // end main
```

### Output

```
Enter the value of amount, number of years and Rate of interest:
100
5
4
The compound interest is = 21.665268
--------------------------------
Process exited after 8.76 seconds with return value 0
Press any key to continue . . .
```

**Run Directly on in-built ***C-Compiler *

*C-Compiler*

While using in-built **C-Compiler **Use Gear icon for custom Input (i.e. whenever you have to give values to read)

**Result**

Thus, the C program has been written, executed successfully to calculate the simple interest and compound interest.