Tutorial Gateway

Python Program to Print Odd Numbers in a List

by

Write a Python Program to Print Odd Numbers in a List using For Loop, While Loop, and Functions with a practical example.

Python Program to Print Odd Numbers in a List using For Loop

In this python program, we are using For Loop to iterate each element in this list. Inside the Python for loop, we are using the If statement to check and print odd numbers.

# Python Program to Print Odd Numbers in a List

NumList = []

Number = int(input("Please enter the Total Number of List Elements: "))
for i in range(1, Number + 1):
    value = int(input("Please enter the Value of %d Element : " %i))
    NumList.append(value)

print("\nOdd Numbers in this List are : ")
for j in range(Number):
    if(NumList[j] % 2 != 0):
        print(NumList[j], end = '   ')

OUTPUT

Python Program to Print Odd Numbers in a List 1

ANALYSIS

User entered list elements = [3, 4, 5, 9]. Within this python program, the For Loop iteration is

For Loop – First Iteration: for 0 in range(0, 4)
The condition is True. So, it enters into the If Statement

if(NumList[0] % 2 != 0) => if(3 % 2 != 0) – Condition is True
This Number printed.

Second Iteration: for 1 in range(0, 4) – Condition is True
if(NumList[1] % 2 != 0) => if(4 % 2 != 0) – Condition is False
This Number Skipped.

Third Iteration: for 2 in range(0, 4) – Condition is True
if(NumList[2] % 2 != 0) => if(5 % 2 != 0) – Condition is True
This Number printed.

Fourth Iteration: for 3 in range(0, 4) – Condition is True
if(9 % 2 != 0) – Condition is True
This Number also printed.

Fifth Iteration: for 4 in range(0, 4) – Condition is False
So, it exits from Python For Loop

Python Program to Print Odd Numbers in a List using While loop

This Python program for odd numbers in a list is the same as the above. We just replaced the For Loop with While loop.

# Python Program to Print Odd Numbers in a List

NumList = []
j = 0

Number = int(input("Please enter the Total Number of List Elements: "))
for i in range(1, Number + 1):
    value = int(input("Please enter the Value of %d Element : " %i))
    NumList.append(value)

print("\nOdd Numbers in this List are : ")
while(j < Number):
    if(NumList[j] % 2 != 0):
        print(NumList[j], end = '   ')
    j = j + 1

OUTPUT

Python Program to Print Odd Numbers in a List 2

Python Program for Odd Numbers in a List using Functions

This Python odd numbers in a list program is the same as the first example. However, we separated the logic using Functions

# Python Program to Print Odd Numbers in a List

def odd_numbers(NumList):
    for j in range(Number):
        if(NumList[j] % 2 != 0):
            print(NumList[j], end = '   ')

      
NumList = []
Number = int(input("Please enter the Total Number of List Elements: "))
for i in range(1, Number + 1):
    value = int(input("Please enter the Value of %d Element : " %i))
    NumList.append(value)

print("\nOdd Numbers in this List are : ")
odd_numbers(NumList)

OUTPUT

Python Program to Print Odd Numbers in a List 3