While Loop in Python

 The while loop in Python is used to execute a piece of code infinitely many times till a specific condition is satisfied. When the condition becomes false, the line immediately after the loops is executed.

For example,

x=0

while x<5:
  print(x)
  x+=1

print("x is no longer lesser than 5.")

The output-

0
1
2
3
4
x is no longer greater than 5

Here, the interpreter stops executing the code located inside the while loop and moves on to the line immediately after the loop, which here is, print("x is no longer lesser than 5.").

The break statement

The break statement is used to stop a while loop even when the condition is true.

For example-

x=2

while x<6:
  if x==4:
    break
  else:
    print(x)
    x+=1

The output-

2
3

Here, the while loop stops when the value of x is 4 and doesn’t execute further.

The True keyword, which is actually a boolean value, is also used with while loops.

It is used in the form of while True:, and is generally followed by an if-else statement.

Conditional Statements in Python

In Python, if-else statements are used to execute a piece of code if a condition is true or not.

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For example-

x=50

while True:
  if x<55:
    print(x)
    x+=1
  else:
    break

The output-

50
51
52
53
54

Here, the interpreter checks if x<55. If it is, it prints the value of x and adds 1 to it. It keeps doing this till x<55 is no longer true, and then moves on to the next code block (after the while loop).

The continue statement can be used in the same way as with for loops.

For Loop in Python

In Python, a for loop is used to iterate over a list, tuple, set, dictionary, or string.

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Infinite Loops

You can create an infinite loop using while. This means that the loop keeps going on forever.

Personally, I find it quite fun to do so.

Lets see how to do it-

while True:
  print("Hi")

The output-

Hi
Hi
Hi
Hi
(goes on till you stop the execution.)

That is all about the while loop in Python. Follow me for more such content on Python.

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Happy Coding,

Aarav Iyer