Random number generation has always been an important application and has many uses in everyday life. Python offers a function that can generate random numbers from a given range, as well as allowing numbers for steps to be included in the cost, called randrange () in a random module. This feature is discussed in more detail in this article.
Syntax: random.randrange (start (opt), stop, step (opt)) Parameters: start (opt): Number consideration for generation starts from this, default value is 0. This parameter is optional. stop: Numbers less than this are generated. This parameter is mandatory. step (opt): Step point of range, this won't be included. This is optional. Default value is 1. Return Value: This function generated the numbers in the sequence startstop skipping step. Exceptions: Raises ValueError if stop & lt; = start and number is non integral .
# Python code to demonstrate how it works
# randrange ()
import
random
# Using randrange () to generate numbers from 0 to 100
print
(
"Random number from 0100 is: "
, end
=
" ")
print
(random.randrange (
100
))
# Using randrange () to generate numbers from 50 d about 100
print
(
"Random number from 50100 is: "
, end
=
" ")
print
(random.randrange (
50
,
100
))
# Using randrange () to generate numbers between 50 and 100
# skip 5
print
(
"Random number from 50100 skip 5 is:"
, end
=
" ")
print
(random.randrange (
50
,
100
,
5
))
Output:
Random number from 0100 is: 26 Random number from 50100 is: 58 Random number from 50100 skip 5 is: 90
Exceptions
1. Error value — floating point value

Output:
Random number from 14.5100 is:
Runtime error:
Traceback (most recent call last) : File "/home/5e40f42505a6926d0c75a09bec1279d9.py", line 9, in print (random.randrange (14.5,100)) File "/usr/lib/python3.5/random.py", line 182, in randrange raise ValueError ( "noninteger arg 1 for randrange ()") ValueError: noninteger arg 1 for randrange ()
2. Value error — start & gt; = stop

Output:
Random number from 500100 is:
Runtime error:
Traceback (most recent call last): File "/home/ea327cf3f1dd801a66a185d101c5cb13.py", line 9, in print (random.randrange (500,100)) File "/usr/lib/python3.5/random.py", line 196, in randrange raise ValueError ("empty range for randrange () (% d,% d, % d) "% (istart, istop, width)) ValueError: empty range for randrange () (500,100, 400)
Practical Application
Random number generation has always been an important application and has been used in many casino games, for gambling in many children's games, such as ludo, etc., which use the Dice concept. A short game about who reached the first 100 wins is shown in the code below. Each player is allowed to play dice from 1 to 10 numbers, i.e. 110 can be reached on each turn. ,

Output:
Total score of Player 1 after turn 1 is: 9 Total score of Player 2 after turn 1 is: 8 Total score of Player 1 after turn 2 is: 15 Total score of Player 2 after turn 2 is: 10 Total score of Player 1 after turn 3 is: 16 Total score of Player 2 after turn 3 is: 12 Total score of Player 1 after turn 4 is: 23 Total score of Player 2 after turn 4 is: 13 Total score of Player 1 after turn 5 is: 26 Total score of Player 2 after turn 5 is: 16 Total score of Player 1 after turn 6 is: 33 Total score of Player 2 after turn 6 is: 23 Total score of Player 1 after turn 7 is: 41 Total score of Player 2 after turn 7 is: 31 Total score of Player 1 after turn 8 is: 43 Total score of Player 2 after turn 8 is: 39 Total score of Player 1 after turn 9 is: 51 Total score of Player 2 after turn 9 is: 45 Total score of Player 1 after turn 10 is: 56 Total score of Player 2 after turn 10 is: 50 Total score of Player 1 after turn 11 is: 57 Total score of Player 2 after turn 11 is: 59 Total score of Player 1 after turn 12 is: 60 Total score of Player 2 after turn 12 is: 66 Total score of Player 1 after turn 13 is: 64 Total score of Player 2 after turn 13 is: 68 Total score of Player 1 after turn 14 is: 69 Total score of Player 2 after turn 14 is: 76 Total score of Player 1 after turn 15 is: 71 Total score of Player 2 after turn 15 is: 80 Total score of Player 1 after turn 16 is: 72 Total score of Player 2 after turn 16 is: 85 Total score of Player 1 after turn 17 is: 76 Total score of Player 2 after turn 17 is: 87 Total score of Player 1 after turn 18 is: 78 Total score of Player 2 after turn 18 is: 94 Total score of Player 1 after turn 19 is: 79 Total score of Player 2 after turn 19 is: 102 Player 2 wins the game
This article courtesy of Manjeet Singh . If you are as Python.Engineering and would like to contribute, you can also write an article using contribute.python.engineering or by posting an article contribute @ python.engineering. See my article appearing on the Python.Engineering homepage and help other geeks.
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