# Python Program to Calculate Simple and Compound Interest

Python program to calculate simple and compound interest; In this tutorial, you will learn how to calculate simple interest and compound interest in python.

## Python Program to Calculate Simple and Compound Interest

See the following to python program to calculate simple interest and compound interest; as shown below:

• Python Program to Calculate Simple Interest
• Python Program to Compute Compound Interest

### Python Program to Calculate Simple Interest

Use the following steps to write a program to calculate simple interest in python:

• Use a python input() function in your python program that takes an input from the user.
• Next, calculate the simple interest using this SI = (P * N * R)/100  formula.
• After the end program, print the simple interest.
```#Python program to calculate simple interest

P = float(input("Enter the principal amount : "))

N = float(input("Enter the number of years : "))

R = float(input("Enter the rate of interest : "))

#calculate simple interest by using this formula
SI = (P * N * R)/100

#print
print("Simple interest : {}".format(SI))
```

Output

```Enter the principal amount :  1000
Enter the number of years :  2
Enter the rate of interest :  5
Simple interest : 100.0 ```

### Python Program to Compute Compound Interest

Use the following steps to write a program to calculate compound interest in python:

• Use a python input() function in your python program that takes an input (principal amount, rate of interest, time) from the user.
• Next, calculate the compound interest using this p * (pow((1 + r / 100), t))  formula.
• After the end program, print the compound interest.
```#Python program to compute compound interest

p = float(input("Enter the principal amount : "))

t = float(input("Enter the number of years : "))

r = float(input("Enter the rate of interest : "))

#compute compound interest
ci =  p * (pow((1 + r / 100), t))

#print
print("Compound interest : {}".format(ci))
```

Output

```Enter the principal amount :  1000
Enter the number of years :  2
Enter the rate of interest :  5
Compound interest : 1102.5 ```