## Python random :  gammavariate()

This article demonstrates how to use `random.gammavariate` function . `gammavariate() `is an inbuilt method of the `random` module. It is used to return a random floating point number with gamma distribution.

## Syntax :

random.gammavariate(alpha,beta)

## Parameter Values :

ParameterDescription
alphaRequired. Greater than 0.
betaRequired. Greater than 0.

#### Return Value :

a random gamma distribution floating number

Example :

1.

`# import the random module import random # determining the values of the parameter alpha = 100beta = 2# using the gammavariate() method print(random.gammavariate(alpha, beta)) `
Output :
205.2298728738377

2.We can generate the number multiple times and plot a graph to observe the gamma distribution.
`# import the required libraries import random import matplotlib.pyplot as plt     # store the random numbers in a # list nums = [] alpha = 9beta = 0.5    for i in range(100):     temp = random.gammavariate(alpha, beta)     nums.append(temp)         # plotting a graph plt.plot(nums) plt.show() `

Output :

3.We can create a histogram to observe the density of the gamma distribution.

`# import the required libraries import random import matplotlib.pyplot as plt     # store the random numbers in a list nums = [] alpha = 9beta = 0.5    for i in range(10000):     temp = random.gammavariate(alpha, beta)     nums.append(temp)         # plotting a graph plt.hist(nums, bins = 200) plt.show() `

Output :

******END OF ARTICLE******

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