Generate a random number in Python

This post will discuss how to generate a random number in Python.

1. Using `random.randrange()` function

A simple approach to generate a random number between the specified range in Python is using the random.randrange() function. Here’s an example of its usage:

import random

if __name__ == '__main__':

start = 1

end = 5

# print random number between start (inclusive) & end (exclusive)

print(random.randrange(start, end))

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To generate a random element less than a value, you can use the following code:

import random

if __name__ == '__main__':

# print random number between 0 and 9, both inclusive

print(random.randrange(10))

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2. Using `random.randint()` function

The random.randrange(x, y) function generates the random integer n such that x <= n < y. If you need to generate a random number inclusive of the end argument (i.e., x <= n <= y), use the random.randint(x, y) function.

In other words, random.randint(x, y) function is equivalent for random.randrange(x, y+1).

import random

if __name__ == '__main__':

start = 1

end = 5

# print random number between start & end, both inclusive

print(random.randint(start, end))

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3. Using `random.choice()` function

The randint() or randrange() is the preferred way to generate a random number from a continuous sequence. To pick a random item from a sequence like a list or a tuple, you should use the random.choice() function.

import random

if __name__ == '__main__':

values = list(range(1, 10))

# print a random number from a specified list

rand = random.choice(values)

print(rand)

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4. Using `secrets.randbelow()` function

The random module is used to generate pseudorandom numbers. To generate a cryptographically secure random number, consider using the randbelow() function from the secrets module.

import secrets

if __name__ == '__main__':

# print cryptographically secure random number

# between 0 and 9, both inclusive

print(secrets.randbelow(10))

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5. Using `secrets.choice()` function

The secrets.randbelow() function is preferred to cryptographically secure random numbers from a continuous sequence. To generate a cryptographically secure random number from a sequence like a list or a tuple, use the secrets.choice() function.

import secrets

if __name__ == '__main__':

values = list(range(1, 10))

# print cryptographically secure random number from a specified list

rand = secrets.choice(values)

print(rand)

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6. Using `numpy.random.randint()` function

With NumPy, you may use the numpy.random.randint(x, y) function.

import numpy as np

if __name__ == '__main__':

start = 1

end = 5

print(np.random.randint(start, end))

That’s all about generating a random number in Python.

Generate a random number in Python

1. Using random.randrange() function

2. Using random.randint() function

3. Using random.choice() function

4. Using secrets.randbelow() function

5. Using secrets.choice() function

6. Using numpy.random.randint() function

Share this:

1. Using `random.randrange()` function

2. Using `random.randint()` function

3. Using `random.choice()` function

4. Using `secrets.randbelow()` function

5. Using `secrets.choice()` function

6. Using `numpy.random.randint()` function