# Python Program to Calculate Simple Interest

Python program to calculate simple interest; Through this tutorial, i am going to show you how to calculate simple interest in python.

Please look at the formula for calculating the simple interest; as shown below:

``` (P * N * R)/100

```
• Where, P is the principal amount
• R is the rate and
• N is the time span

## Python Program to Calculate Simple Interest

• Write a Program to Calculate Simple Interest in Python
• Write a Python Program to Calculate Simple Interest using Function

### Write a Program to Calculate Simple Interest in Python

• Takes an input from the user.
• Calculate the simple interest using this SI = (P * N * R)/100  formula.
• 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 ```

### Write a Python Program to Calculate Simple Interest using Function

• Define a function in your python program that accepts the argument and calculate simple interest by using this SI = (P * N * R)/100 formula.
• Takes an input from the user.
• Call simple interest function with specific arguments.
• Print the simple interest.
```#Python program to calculate simple interest using function
def simpleInterest(P, N, R):
SI = (P * N * R)/100
return SI

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 = simpleInterest(P, N, R)
#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 ```

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