# Python Program to Calculate Value of PI Using Leibniz Formula

The Leibniz formula is an infinite series method of calculating Pi. The formula is a very simple way of calculating Pi, however, it takes a large amount of iterations to produce a low precision value of Pi.

In this python program we first read number of term to consider in series from user and then apply Leibniz formula to caluclate value of Pi.

## Python Source Code: Calculation of Pi using Leibniz Formula

``````
# Calculation of PI using Leibniz formula

# Function to calcultae PI using Leibniz
def leibniz(n):
t_sum = 0
for i in range(n):
term = (-1) ** i /(2*i+1)
t_sum = t_sum + term

return t_sum * 4

# Reading number of terms to be considered in Leibniz formula
terms = int(input("Enter number of terms: "))

# Function call
pi = leibniz(terms)

# Displaying result
print("Pi = ", pi)
``````

## Output

```Enter number of terms: 100000
Pi =  3.1415826535897198
```
To get more accurate result use higher number of terms in series.