Write a python program to print all natural numbers (from 1 to n). - using while loop

Python program to print numbers from n to 1 and 1 to n; In this tutorial, you will learn how to print numbers from n to 1 and n to 1 using for loop and while loop.

• Python program to print numbers from 1 to N using for loop
• Python program to print numbers from N to 1 using while loop

Python program to print numbers from 1 to N using for loop

• Take the input from the user by using python input() function.
• Iterate for loop with the user input number.
• Increment for loop iteration value by 1, as well as print iteration value.

# Python program to print numbers from 1 to n

n = int(input("Please Enter any Number: "))

print("The List of Natural Numbers from 1", "to", n) 

for i in range(1, n + 1):
    print (i, end = '  ')

Output

Please Enter any Number:  15 
The List of Natural Numbers from 1 to 15 
1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  

Python program to print numbers from n to 1 using while loop

• Take the input from the user by using python input() function.
• Iterate while loop with the user input number.
• Decrement while loop iteration value by 1, as well as print iteration value.

# Python program to print numbers from n to 1

number = int(input("Please Enter any Number: "))
i = number

while ( i >= 1):
    print (i, end = '  ')
    i = i - 1

Output

Please Enter any Number:  5 
5  4  3  2  1

Recommended Python Programs

In this post, we will learn how to print natural numbers from 1 to N using Python Programming language.

Natural numbers are a part of the number system used for counting which includes all the positive integers from 1 till infinity. For example: 1, 2, 3, 4, 5. . . so on.

We will be printing natural numbers using the following methods:

1. Using for loop
2. Using while loop
3. Using functions

So, without further ado, let’s begin this tutorial.

• Python Program to Print Natural Numbers From 1 to N
• How Does This Program Work ?
• Python Program to Print Natural Number Using While Loop
• Python Program to Print Natural Numbers Using Functions
• Conclusion

# Python Program to Print Natural Numbers From 1 to N
num = int(input("Enter any number: "))

print("The list of natural numbers from 1 to {0} are: " .format(num))
for i in range(1, num + 1):
    print(i)

Output

Enter any number: 15
The list of natural numbers from 1 to 15 are: 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

How Does This Program Work ?

num = int(input("Enter any number: "))

The user is asked to enter the upper limit of the list. 

for i in range(1, num + 1):
    print(i) 

We print all the numbers lying between 1 to num (including both 1 and num) using for loop statement.

Python Program to Print Natural Number Using While Loop

# Python Program to Print Natural Number Using While Loop
num = int(input("Enter maximum natural number: "))

print("The list of natural numbers from 1 to {0} are: " .format(num))
i = 1
while i <= num:
    print(i)
    i = i + 1

Output

Enter maximum natural number: 7
The list of natural numbers from 1 to 7 are: 
1
2
3
4
5
6
7

Python Program to Print Natural Numbers Using Functions

# Python Program to Print Natural Numbers Using Functions 
def NaturalNumber(num):
    for i in range(1, num + 1):
        print(i)
        
num = int(input("Enter the maximum natural number: ")) 
print("The list of natural numbers from 1 to {0} are: " .format(num))

NaturalNumber(num)

Output

Enter the maximum natural number: 5
The list of natural numbers from 1 to 5 are: 
1
2
3
4
5

Conclusion

I hope after going through this post, you understand how to print natural numbers from 1 to N using Python Programming language.

If you have any doubt regarding the program, feel free to contact us in the comment section. We will be delighted to assist you.

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