Python - Importance Of While Condition ✍️

Sriganapathi Sekar
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In the last session, we discussed loop statements and various methods. Now, we will learn the importance of the while statement.

Let’s start,

WHILE STATEMENT

We can run the statement when the condition is true, false means exit.
While statement plays a very important role in projects.

Syntax

Flow chart

A simple example of a while statement

Input:

a=1
while a<=6:
    a=a+1
    print(a)

Output:
2
3
4
5
6
7

Printing the given values mentioned times

Input:

count=0
while count<5:
    print(2,end=' ')
    count=count+1

Output:
22222

Numbers in descending order consequently

Input:

last=int(input("Enter the last number:"))
while last>0:
    print(last)
    last=last-1

Output:
Enter the last number:5
5
4
3
2
1

Ascending order with 2 jumps ( odd )

Input:

first=1
last=int(input("Enter the last number:"))
while first<=last:
    print(first)
    first=first+2

Output:
Enter the last number:5
1
3
5

Ascending order with 2 jumps ( even )

Input:

first=2
last=int(input("Enter the last number:"))
while first<=last:
    print(first)
    first=first+2

Output:
Enter the last number:9
2
4
6
8

Multiples of 3 using while loop

Input:

first=0
last=20
while first<=last:
    first=first+3
    print(first)

Output:
3
6
9
12
15
18
21

Multiples of 3 with 2 jumps

Input:

first=1
last=50
while first<=last:
    if first%3==0:
        print(first)
    first=first+2

Output:
3
9
15
21
27
33
39
45

Printing ( i x 3 ) values using loop

Input:

first=3
while first<=100:
    print(first)
    first=first*3

Output:
3
9
27
81

Number divisible by 2 and 3 using while and nested if

Input:

number=1
while number<=70:
    if number%2==0:
        if number%3==0:
            print(number)
    number=number+1

Output:
6
12
18
24
30
36
42
48
54
60
66

Number divisible by 2 and 3 using while, if, and logical operator

Input:

number=1
while number<=80:
    if (number%2==0 and number%3==0):
        print(number)
number=number+1

Output:
6
12
18
24
30
36
42
48

Sum of first n consecutive numbers

Input:

number=1
last=100
total=0
while number<=100:
    total=total+number
    number=number+1
print(total)

Output:
5050

While else using loop condition

Input:

name='mark zuckerberg'
person=''
while person!=name:
        person=input("Please tell me your name:")
else:
        print("I got your name")

Output:
Please tell me your name:larry page
Please tell me your name:zuckerberg
Please tell me your name:mark
Please tell me your name:mark zucker
Please tell me your name:mark zuckerberG
Please tell me your name:Mark ZuckeRbeRg
Please tell me your name:mark zuckerberg
I got your name

Printing a word using index

Input:

language ='Python'
i=0
while i<len(language):
        print(language[i])
        i=i+1

Output:
P
y
t
h
o
n

Game using a while loop statement

Input:

mind = 7
match_not_found = True
while match_not_found == True:
       guess =  int(input("\nGuess my memory number between 1 & 20 : "))
       if guess == mind:
              print("Your guess is correct")
              match_not_found = False
       elif guess > mind:
              print("Your guess is Higher")
       else:
              print("Your guess is Lower")

Output:
Guess my memory number between 1 & 20 : 15
Your guess is Higher
Guess my memory number between 1 & 20 : 10
Your guess is Higher
Guess my memory number between 1 & 20 : 5
Your guess is Lower
Guess my memory number between 1 & 20 : 6
Your guess is Lower
Guess my memory number between 1 & 20 : 9
Your guess is Higher
Guess my memory number between 1 & 20 : 7
Your guess is correct

I hope now you can understand about While Loop. If you have any query please ask me. We'll see a more interesting topic in the future.

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