Write a Python Program to Put Even and Odd Numbers in Separate List using For Loop, While Loop, and Functions with practical example.
Before you start, please refer List article to understand everything about Lists.
Python Program to Put Even and Odd Numbers in Separate List using For Loop
In this python program, we are using For Loop to iterate each and every element in a given List. Inside the loop we are using If statement to check whether the list item is Even or odd. Based on the result, we are appending that item to Even list or Odd list.
# Python Program to Put Even and Odd Numbers in Separate List
NumList = []
Even = []
Odd = []
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)
for j in range(Number):
if(NumList[j] % 2 == 0):
Even.append(NumList[j])
else:
Odd.append(NumList[j])
print("Element in Even List is : ", Even)
print("Element in Odd List is : ", Odd)OUTPUT
ANALYSIS
In this Python Program to separate Even and Odd values in List, User entered items = [22, 33, 44, 55, 77]
For Loop – First Iteration: for 0 in range(0, 5)
The condition is True so, compiler will enter into the If Statement
if(NumList[0] % 2 == 0) => if(22 % 2 == 0) – Condition is True
Even.append(NumList[0]) => Even = [22]
Second Iteration: for 1 in range(0, 5) – Condition is True
if(NumList[1] % 2 == 0) => if(33 % 2 == 0) – Condition is False
Compiler will enter into the Else block.
Odd.append(NumList[1]) => Odd = [33]
Third Iteration: for 2 in range(0, 5) – Condition is True
if(NumList[2] % 2 == 0) => if(44 % 2 == 0) – Condition is True
Even.append(44) => Even = [22, 44]
Fourth Iteration: for 3 in range(0, 5) – Condition is True
if(55 % 2 == 0) – Condition is False
Compiler will enter into Else block.
Odd.append(55) => Odd = [33, 55]
Fifth Iteration: for 4 in range(0, 5) – Condition is True
if(77 % 2 == 0) – Condition is False
Compiler will enter into Else block.
Odd.append(77) => Odd = [33, 55, 77]
Sixth Iteration: for 5 in range(5) – Condition is False
So compiler will exit from For Loop
Python Program to Put Even and Odd Numbers in Separate List using While loop
This program for placing even numbers in Even List, and odd numbers in Odd List is same as above. We just replaced the For Loop with While loop.
# Python Program to Put Even and Odd Numbers in Separate List
NumList = []
Even = []
Odd = []
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)
while(j < Number):
if(NumList[j] % 2 == 0):
Even.append(NumList[j])
else:
Odd.append(NumList[j])
j = j + 1
print("Element in Even List is : ", Even)
print("Element in Odd List is : ", Odd)OUTPUT
Python Program to Put Even and Odd Numbers in Separate List using Functions
This program is same as first example. However, we separated the logic using Functions. Remember, instead of writing separate functions for Even and Odd, you can also write single function.
# Python Program to Put Even and Odd Numbers in Separate List
def even_numbers(NumList):
Even = []
for j in range(Number):
if(NumList[j] % 2 == 0):
Even.append(NumList[j])
print("Element in Even List is : ", Even)
def odd_numbers(NumList):
Odd = []
for j in range(Number):
if(NumList[j] % 2 != 0):
Odd.append(NumList[j])
print("Element in Odd List is : ", Odd)
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)
even_numbers(NumList)
odd_numbers(NumList)OUTPUT
