The randint() Method Example
Multiple Randint Python Method Calls
In this example, we are making multiple random.randint() method calls in Python.
Python3
import random beg,end = 1 , 1000 for i in range ( 5 ): print (random.randint(beg, end)) |
94 550 236 145 747
Program to Demonstrate the ValueError
In this example, we are seeing that if we passes the floating point values as parameters in the randint() function then a ValueError occurs.
Python3
# imports random module import random '''If we pass floating point values as parameters in the randint() function''' r1 = random.randint( 1.23 , 9.34 ) print (r1) |
Output :
Traceback (most recent call last):
File "/home/f813370b9ea61dd5d55d7dadc8ed5171.py", line 6, in
r1=random.randint(1.23, 9.34)
File "/usr/lib/python3.5/random.py", line 218, in randint
return self.randrange(a, b+1)
File "/usr/lib/python3.5/random.py", line 182, in randrange
raise ValueError("non-integer arg 1 for randrange()")
ValueError: non-integer arg 1 for randrange()
Program to Demonstrate the TypeError
In this example, we can see that if we pass string or character literals as parameters in the randint() function then a TypeError occurs.
Python3
# 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 :
Traceback (most recent call last):
File "/home/fb805b21fea0e29c6a65f62b99998953.py", line 5, in
r2=random.randint('a', 'z')
File "/usr/lib/python3.5/random.py", line 218, in randint
return self.randrange(a, b+1)
TypeError: Can't convert 'int' object to str implicitly
Applications : The randint() function can be used to simulate a lucky draw situation. Let’s say User has participated in a lucky draw competition. The user gets three chances to guess the number between 1 and 10. If guess is correct user wins, else loses the competition.
Python3
# importing randint function # from random module from random import randint # Function which generates a new # random number everytime it executes def generator(): return randint( 1 , 10 ) # Function takes user input and returns # true or false depending whether the # user wins the lucky draw! def rand_guess(): # calls generator() which returns a # random integer between 1 and 10 random_number = generator() # defining the number of # guesses the user gets guess_left = 3 # Setting a flag variable to check # the win-condition for user flag = 0 # looping the number of times # the user gets chances while guess_left > 0 : # Taking a input from the user guess = int ( input ( "Pick your number to " "enter the lucky draw\n" )) # checking whether user's guess # matches the generated win-condition if guess = = random_number: # setting flag as 1 if user guesses # correctly and then loop is broken flag = 1 break else : # If user's choice doesn't match # win-condition then it is printed print ( "Wrong Guess!!" ) # Decrementing number of # guesses left by 1 guess_left - = 1 # If win-condition is satisfied then, # the function rand_guess returns True if flag is 1 : return True # Else the function returns False else : return False # Driver code if __name__ = = '__main__' : if rand_guess() is True : print ( "Congrats!! You Win." ) else : print ( "Sorry, You Lost!" ) |
Output
Pick your number to enter the lucky draw
8
Wrong Guess!!
Pick your number to enter the lucky draw
9
Wrong Guess!!
Pick your number to enter the lucky draw
0
Congrats!! You Win.
randint() Function in Python
randint() is an inbuilt function of the random module in Python3. The random module gives access to various useful functions one of them being able to generate random numbers, which is randint(). In this article, we will learn about randint in Python.