How to generate random floating numbers in Python

By Manam Sampath Kumar Reddy

In this tutorial, we will learn how to get float numbers between two numbers using Python. To get a random floating number we will use random.uniform() function this will give a float number between a given range. We can also round these floating numbers using the round() function in Python. This link will help to understand How to Round Numbers in Python Language.

We can get float numbers between closed 0 to open 1 using random.random() function. We can also get a random number between any range using the same function. You can look into implementation in the below codes.

Let’s look into a few implementations:

random.uniform() method example:

#importing required libraries
import random

#getting random float number between two float numbers using uniform method
ran_flo=random.uniform(6.66,15.99)
print(ran_flo)

Output:

11.77998206000711

Code to round off the random float

If you want to stick to a fixed number of decimals then you can round it off to a required number of decimals. Here is the implementation for this.

#importing required libraries
import random

#getting random float number between two float numbers using uniform method
ran_flo=random.uniform(6.66,15.99)
ran_flo=round(ran_flo,3)
print(ran_flo)

Output:

8.476

Code using random.random() function

the random library also provides a function to get float number using random function. This function gives a random number between 0 to 1.00. [0,1.0).

Here is the implementation for this function:

#importing required libraries
import random

#getting random float number between 0 to 1
ran_flo=random.random()
print(ran_flo)

Output:

0.625927267696903

You can also round this using the above example.

Getting random float between any range of numbers

We can also get random float number between any range using random.random() function. Here is the implementation for this.

#importing required libraries
import random
st=10
la=40
#getting random float number between st to la

ran_flo=st+(random.random())*(la-st)
print(ran_flo)

Output:

36.406551704457094