This Blog Explains about Python While Loop and example programs
While Loop :-
*With the while loop we can execute a set of statements as long as a condition is true.
Syntax:-
The syntax of a while loop in Python programming language is
while expression:
statement(s)
*While loop, test expression is checked first.
*The body of the loop is entered only if the test_expression evaluates to True. After one iteration, the test expression is checked again. This process continues until the test_expression evaluates to False.
*In Python, the body of the while loop is determined through indentation.
*The body starts with indentation and the first unindented line marks the end.
*Python interprets any non-zero value as True. None and 0 are interpreted as False.
*While expression end with Colon (:).
Example while loop Programs:
1. Print upto Given Number
begin_num=1
end_num=int(input(“Enter the number to print :”))
while end_num >= begin_num:
print(begin_num)
begin_num =begin_num+1
OUTPUT :-
Enter the number to print:6
1
2
3
4
5
6
>>>
2. Print the Reverse Number :-
last_num = int(input(“please enter the last number to print up to: “)
while last_num >= 0:
print (last_num)
last_num=last_num-1
Output:-
please enter the last number to print up to: 5
5
4
3
2
1
>>>>
3. Print the Odd number in Python :-
start_num= 1
end_num = int(input(“Enter the Last Number : ” ))
while start_num<= end_num:
print(start_num)
start_num+= 2
Output:-
Enter the Last Number : 10
1
3
5
7
9
>>>>>
Reference :