Python 3 tutorial for beginners in Hindi-Chapter 17(While loop)

While Loop in Python

While loop एक known range की दोहराव प्रक्रिया है।

Syntax

while condition:
   statement 1
   statement 2
other statements

उपरोक्त syntax में यदि condition सही है तो लूप execute करेगा , अन्यथा अन्य स्टेटमेंट execute होंगे।

Write a program to display 1 to 10 numbers using while loop

no =1
while no! = 11:
   print(no,end=" ")
   no += 1

Output:

1 2 3 4 5 6 7 8 9 10

Write to print the reverse of a number(no)

reverse = 0
while no!=0
   r = no%10
   n = no//10
   reverse =(reverse * 10)+r
print("Reverse of the number is:",reverse)

Write a program to calculate the sum of digits of a number(no)

sum = 0
while no! = 0:
   r = no%10
   no = no//10
   sum =sum +r
print("Sum of digits is:",sum)

Write a program to print the sum of the first & last digit of a number(no).

first_digit = no%10
while no!=0:
   last_digit = no%10
   no = no//10
print("Sum of the digits is:",first_digit+last_digit)

Write to read 4 digit number(no) &print sum of 2 middle digits

first_digit = no % 10
if x >= 1000 and x <= 9999:
   sum = 0
   while no!= 0:
      r = no % 10
      no = no//10
      sum += r
print("Sum of middle:"sum-(first_digit-r))
else:
   print("please enter 4 digit number")

Write a program to calculate the sum of digits of a number(no) till you get a single digit.

r = 0
sum = 0
while sum<10 and sum>0:
   while no!= 0:
      r =no%10
      no =no//10
      sum = sum +r
print("sum")

इस chapter में हमने while loop के बारे में पढ़ा। अगले चैप्टर में input(),recursive function के बारे में पढ़ेंगे।

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