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While Loop

While:
'while' is a keyword in python language which is used to execute one block of statements several number of times based on the condition.
Syntax
while(condition):
    ...
    ...
    ...
In the above syntax if the condition is true the statements of while block is execute infinite times, if the condition is false while block terminated :

Key Points

  • What is While Loop

Image

While Loop Programs


Key Points

  • What is While Loop

Image
Display 1 to 10 Values Using While Loop 



def myfun():
    x=1
    while(x<=10):
        print(x)
        x=x+1
   
if __name__=="__main__":
    myfun()
Output:
1
2
3
4
5
6
7
8
9
10

Display 10 to 1 Values Using While Loop 



def myfun():
    x=10
    while(x>=1):
        print(x)
        x=x-1

if __name__=="__main__":
    myfun()
Output:
10
9
8
7
6
5
4
3
2
1

Nested For While In java


Nested While Loop :
One While loop within another While loop is knows as Nested While Loop Syntax

while(condition):
    while(condition):
        ...
        ...
        ...
    ...
    ...
    ...
In the above syntax :
Outer loop is Row
Inner loop is Column

Key Points

  • What is Nested While Loop

Image
***
***
***
***
***
***


def myfun():
    x=1
    while(x<=6):
        y=1
        while(y<=3):
            print("*",end="")
            y=y+1

        print(end="\n")
        x=x+1

if __name__=="__main__":
    myfun()
Output:
***
***
***
***
***
***

*
**
***
****
*****
******


def myfun():
    x=1
    while(x<=6):
        y=1
        while(y<=x):
            print("*",end="")
            y=y+1

        print(end="\n")
        x=x+1

if __name__=="__main__":
    myfun()
Output:
*
**
***
****
*****
******

******
*****
****
***
**
*


def myfun():
    x=1
    while(x<=6):
        y=6
        while(y>=x):
            print("*",end="")
            y=y-1

        print(end="\n")
        x=x+1

if __name__=="__main__":
    myfun()
Output:
******
*****
****
***
**
*