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How to Generate Random Number in Python? (Program)

In computer programming, randomness plays a fascinating role, enabling a myriad of applications, from games and simulations to cryptography and data analysis. Python offers robust functionality for the generation of random numbers effortlessly. Here, we will understand how to generate random numbers in Python.

Random number generation adds an element of unpredictability, injecting excitement and novelty into our programs. Python provides a powerful module called "random," which empowers developers to incorporate randomness into their applications with ease. 

From generating a single random number to generating sequences of random numbers, the possibilities are endless.

Throughout this post, we provide several examples of how to generate a random number in Python, code snippets, and explanations. Let’s get started!

Python Program to Generate Random Number Between 0 to 100

Code

# How to generate a random number between 0 to 100
import random

# Generate a random number between 1 and 100 (inclusive)
random_number = random.randint(1, 100)

# Display the random number
print("Random number:", random_number)

Output

Random number: 49

(output will be different each time you run the program)

Explanation

In this program, we import the random module, which provides functions for generating random numbers. The randint() function from the random module is used to generate a random integer between the specified range. In this case, we generate a random number between 1 and 100 (inclusive) and store it in the variable random_number.

Finally, we use the print() function to display the random number on the console or output window.

When you run this program, it will generate a random number between 1 and 100 (inclusive) each time it is executed and display the result. The specific number generated will vary each time, adding an element of unpredictability and randomness to the program's output.

Python Course

Python Program to Generate Random Number Between 0 to 10

Code

# How to generate random number between 0 and 10
import random

# Generate a random number between 0 and 10 (inclusive)
random_number = random.randint(0, 10)

# Display the random number
print("Random number between 0 and 10:", random_number)

Output

Random number between 0 and 10: 5

(output will be different each time you run the program)

Explanation

In this case, we generate a random number between 0 and 10 (inclusive) and store it in the variable random_number.

Next, we use the print() function to display the random number on the console or output window.

Generate Random Number Between 0 to 1

Code

import random

# Generate a random number between 0 and 1
random_number = random.random()

# Display the random number
print("Random number between 0 and 1:", random_number)

Output

Random number between 0 and 10: 0.02015500708918261 

(output will be different each time you run the program)

Explanation

The random() function from the random module is used to generate a random float between 0 and 1. The generated number will be greater than or equal to 0 but less than 1.

When you run this program, it will generate a random number between 0 and 1 each time it is executed and display the result.

Generate Random Number With No Repeats

Code

# Python Random Number Generator Without Repeating
import random

# Set the range and number of random numbers to generate
start_range = 1
end_range = 10
num_numbers = 5

# Generate unique random numbers
random_numbers = random.sample(range(start_range, end_range + 1), num_numbers)

# Display the random numbers
print("Random numbers without repeats:", random_numbers)

Output

Random numbers without repeats: [4, 2, 1, 8, 10]

Explanation

  • In this program, we import the random module, which provides functions for generating random numbers. We specify the range of numbers to choose from using the variables start_range and end_range.
  • We also define the number of random numbers to generate with the variable num_numbers.
  • The random.sample() function is then used to generate a list of unique random numbers from the given range. It takes two arguments: the range of numbers (range(start_range, end_range + 1)) and the number of unique random numbers to select (num_numbers).
  • Finally, we use the print() function to display the generated random numbers on the console.

Practice More Python Programs:

Useful Python Resources:

Python Program to Generate a Random Number: Video