How to Get a Random Number in Python

Random number in Python

To get a random number in Python, use the randint() function from the random module.

For example, let’s generate a random integer between 1 and 100:

import random

random_number = random.randint(1,100)
print(random_number)

Output:

32

To generate a random float, use the uniform function from the random module:

import random

random_float = random.uniform(0,100)
print(random_float)

Output:

87.95647839475612

These are the two basic use cases you are going to need.

Let’s go through some of the most common questions related to generating random numbers in Python.

How to Generate a Random Float Between 0 and 1

To generate a random float between 0 and 1, use the uniform() function from the random library.

For example:

import random

random.uniform(0, 1)

How to Generate a Random Integer Between 0 and 1

To generate a random number that is either 0 or 1, use the randint() function from the random library.

For example:

import random

random.randint(0, 1)

How to Pick a Random Number from a List of Numbers

To randomly choose a number from a list of numbers, use the choice() function from the random module.

For example:

import random

numbers = [1, 2, 3, 4, 5]
random_selection = random.choice(numbers)

print(random_selection)

Output:

4

How to Generate a Random Number Between 1 and 100

To generate a random number between 1 and 100, use the uniform() function from the random library like this:

import random

random_number = random.randint(1, 100)
print(random_number)

Output example:

63

How to Get a Normally Distributed Random Number in Python

To generate a random number from the Gaussian distribution, use the random library’s gauss() function.

For example, let’s generate a random number from a normal distribution with the mean of 5 and standard deviation of 10:

import random
  
# The mean of the distribution
mu = 10

# The standard deviation of the distribution
sigma = 5

print(random.gauss(mu, sigma))

Output example:

11.2619492713289371

How to Simulate Coin Toss in Python—Heads or Tails

import random

def coinToss():
    return random.choice(['Tails', 'Heads'])

print(coinToss())

Output example:

Tails

Conclusion

To generate random numbers in Python, use the random module.

Thanks for reading. I hope you enjoy it.

Happy coding!

Further Reading

50 Python Interview Questions with Answers

50+ Buzzwords of Web Development

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