Python random randint














































Python random randint



Python random randint()

In this article, we will see how to use Python  random.randint() functions to generate a random number. 
randint() is an inbuilt function of the random module in Python3. The random module gives access to various useful functions and one of them being able to generate random numbers, which is randint().
The randint() method returns an integer number selected element from the specified range.

Syntax :

random.randint(startstop)


Parameter Values :

ParameterDescription
startRequired. An integer specifying at which position to start.
stopRequired. An integer specifying at which position to end.


Return Value :

A random integer in range [start, end] including the end points.


This function takes two parameters. Both are mandatory. For example, random.randint(0, 100) will return any random number between 0 to 100.

 Note:

The randint(start, stop) includes both start and stop numbers while generating random integer. It will generate a random number from the inclusive range.


Here in the following example, we are trying to print a random int in a given range using randint() method :

# Python3 program explaining work of randint() function 
  
# imports random module 
import random 
  
# Generates a random number between a given positive range 
r1 = random.randint(0100
print("Random number between 0 and 100 is % d" % (r1)) 
  
# Generates a random number between  two given negative range
r2 = random.randint(-1000
print("Random number between -100 and 0 is % d" % (r2)) 
  
# Generates a random number between  a positive and a negative range
r3 = random.randint(-500500
print("Random number between -500 and 500 is % d" % (r3)) 
Output : 
Random number between 0 and 100 is  15
Random number between -100 and 0 is -22
Random number between -500 and 500 is  476


Errors and Exceptions :

ValueError : Returns a ValueError when floating
point values are passed as parameters.

TypeError : Returns a TypeError when anything other than
numeric values are passed as parameters.

 

Examples :

1. Program demonstrating the ValueError.

# imports random module 
import random 

'''If we pass floating point values as 
parameters in the randint() function'''

r1 = random.randint(5.6511.30
print(r1) 

Output :



2. Program demonstrating the TypeError.

# imports random 
import random 

'''If we pass string or character literals as 
parameters in the randint() function'''

r2 = random.randint('a''z'
print(r2) 

Output : 



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