Random Choice of Random Module in Python with no Repeat

Given the upper limit and lower limit, the task is to generate n natural numbers which are not repeating in Python.

Examples:

Example1:

Input:

Given N=13
Given lower limit range =19
Given upper limit range =45

Output:

The random numbers present in the range from 19 to 45 are :
28 40 24 25 20 44 38 29 21 31 43

Example2:

Input:

Given N=19
Given lower limit range =23
Given upper limit range =41

Output:

The random numbers present in the range from 23 to 41 are : 26 27 40 38 37 41 30 35 36 23 25

Random choice of Random module in Python with no Repeat

Below are the ways to generate n natural numbers which are not repeating in Python.

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Method #1: Using For Loop and randint function (Static Input)

Approach:

  • Import the random module using the import keyword.
  • Give the number n as static input and store it in a variable.
  • Give the lower limit range and upper limit range as static input and store them in two separate variables.
  • Take an empty list (say rndmnumbs) and initialize it with an empty list using [] or list().
  • Loop till n times using For loop.
  • Generate a random number using randint(lowerlimitrange,upperlimitrange) and store it in a variable.
  • Check whether the above random number is present in the list or not using not in operator.
  • If it is not in the list then append the element to the rndmnumbs list using the append() function.
  • Print the rndmnumbs.
  • The Exit of the Program.

Below is the implementation:

# Import the random module using the import keyword.
import random
# Give the number n as static input and store it in a variable.
numbe = 13
# Give the lower limit range and upper limit range as static input
# and store them in two separate variables.
lowerlimitrange = 19
upperlimitrange = 45
# Take an empty list (say rndmnumbs) and initialize it with an empty list
# using [] or list().
rndmnumbs = []
# Loop till n times using For loop.
for m in range(numbe):
        # Generate a random number using randint(lowerlimitrange,upperlimitrange)
    # and store it in a variable.
    randomnumbe = random.randint(lowerlimitrange, upperlimitrange)
    # Check whether the above random number is present in the list or not
    # using not in operator.
    if randomnumbe not in rndmnumbs:
        # If it is not in the list then append the element
        # to the rndmnumbs list using the append() function.
        rndmnumbs.append(randomnumbe)

# Print the rndmnumbs
print('The random numbers present in the range from',
      lowerlimitrange, 'to', upperlimitrange, 'are :')
for q in rndmnumbs:
    print(q, end=' ')

Output:

The random numbers present in the range from 19 to 45 are :
28 40 24 25 20 44 38 29 21 31 43

Method #2: Using For Loop and randint function (User Input)

Approach:

  • Import the random module using the import keyword.
  • Give the number n as user input using int(input()) and store it in a variable.
  • Give the lower limit range and upper limit range as user input using map(),int(),split(),input() functions.
  • Store them in two separate variables.
  • Take an empty list (say rndmnumbs) and initialize it with an empty list using [] or list().
  • Loop till n times using For loop.
  • Generate a random number using randint(lowerlimitrange,upperlimitrange) and store it in a variable.
  • Check whether the above random number is present in the list or not using not in operator.
  • If it is not in the list then append the element to the rndmnumbs list using the append() function.
  • Print the rndmnumbs.
  • The Exit of the Program.

Below is the implementation:

# Import the random module using the import keyword.
import random
# Give the number n as user input using int(input()) and store it in a variable.
numbe = int(input('Enter some random number = '))
# Give the lower limit range and upper limit range as user input
# using map(),int(),split(),input() functions.
# Store them in two separate variables.
lowerlimitrange = int(input('Enter random lower limit range = '))
upperlimitrange = int(input('Enter random upper limit range = '))
# Take an empty list (say rndmnumbs) and initialize it with an empty list
# using [] or list().
rndmnumbs = []
# Loop till n times using For loop.
for m in range(numbe):
        # Generate a random number using randint(lowerlimitrange,upperlimitrange)
    # and store it in a variable.
    randomnumbe = random.randint(lowerlimitrange, upperlimitrange)
    # Check whether the above random number is present in the list or not
    # using not in operator.
    if randomnumbe not in rndmnumbs:
        # If it is not in the list then append the element
        # to the rndmnumbs list using the append() function.
        rndmnumbs.append(randomnumbe)

# Print the rndmnumbs
print('The random numbers present in the range from',
      lowerlimitrange, 'to', upperlimitrange, 'are :')
for q in rndmnumbs:
    print(q, end=' ')

Output:

Enter some random number = 19
Enter random lower limit range = 23
Enter random upper limit range = 41
The random numbers present in the range from 23 to 41 are :
26 27 40 38 37 41 30 35 36 23 25

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