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What is meant by while loop in python?

Amrita Bhattacharjee 987 28 Mar 2023

What is meant by while loop in python?Give suitable example.

python python
Updated 20 Apr 2023
Amrita Bhattacharjee
Amrita Bhattacharjee

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I'm a code enthusiastic final year student pursuing B.Tech in ECE currently in final year and final semester.However, I've done relevant internships as well in the domain of software development and content writing.

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2 Answers

Aryan Kumar
Aryan Kumar 20 Apr 2023
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In Python, a while loop is a control flow statement that allows you to execute a block of code repeatedly while a certain condition is true. The while loop consists of a loop header, a code block, and a condition.

The loop header starts with the while keyword, followed by a condition. The condition is an expression that is evaluated before each iteration of the loop. If the condition is true, the code block is executed. If the condition is false, the loop is exited and control is passed to the next statement after the loop.

Here's an example of a while loop that counts from 1 to 5:

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

While loops are useful when you need to repeat a block of code until a certain condition is met. However, you need to be careful when using while loops to avoid creating infinite loops that never terminate. You should always make sure that the condition will eventually become false, or include a way to break out of the loop if necessary.

Krishnapriya Rajeev
Krishnapriya Rajeev 30 Mar 2023
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In Python, a while loop is a control flow statement that executes a block of code continuously until a certain condition becomes false. The block of code inside the loop is executed as long as the condition gives us true as the value.

Syntax:

while condition:    
	statement(s)

Here, the condition is a boolean expression and is checked for its value before each iteration. If the condition is true, the statement(s) inside the loop is executed. After the execution of the statement(s), the condition is checked again, and the loop continues until the condition becomes false.

Example:

i = 1 		#prints from 1 to 5
while i <= 5:    
	print(i)    
	i += 1	
	#OUTPUT:
	1
	2
	3
	4
	5

In this example, i is initialized to 1. The while loop continues to execute as long as i is less than or equal to 5. Inside the loop, the current value of i is printed, and i is incremented by 1 using the += operator. The loop continues until i becomes 6, where the condition becomes false, and the loop terminates.

The while loop is used to implement complex logic and iterate over data structures. However, it is important to be careful when using while loops to avoid infinite loops.

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