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What does a while loop do?
What does a while loop do?
Repeatedly executes statements as long as a given condition is TRUE.
The syntax of a while loop is: while (___) { statements; update expression; }
The syntax of a while loop is: while (___) { statements; update expression; }
condition
The while loop will execute at least once even if the condition is FALSE.
The while loop will execute at least once even if the condition is FALSE.
False (B)
What must be done to a variable before it is used in the condition of a while loop?
What must be done to a variable before it is used in the condition of a while loop?
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What happens if the condition of a while loop becomes FALSE?
What happens if the condition of a while loop becomes FALSE?
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What is the purpose of the update expression in a while loop?
What is the purpose of the update expression in a while loop?
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Study Notes
While Loop
- A
whileloop repeatedly executes statements as long as a condition isTRUE(nonzero). - Syntax:
while (condition)-
condition: can be an integer value, variable, or expression. -
statements: code to be executed within the loop. -
update expression: changes the state of the condition, ideally to eventually make itFALSE.
-
- The loop continues until the condition evaluates to
FALSEor the loop is terminated using thebreakstatement.
Example: Using while Loop to Sum Numbers
- The example code sums integers from 1 to a user-defined input.
-
n: stores the user-defined upper limit. -
counter: tracks the current integer being added, initialized to 1. -
sum: accumulates the sum of integers. - The loop continues as long as
counteris less than or equal ton. - Inside the loop:
- The current value of
counteris added tosum. -
counteris incremented by 1, ensuring the loop progresses toward its end condition.
- The current value of
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Description
Explore the concept of the 'while' loop in programming, including its syntax and usage. This quiz covers how to sum integers using a 'while' loop and how the loop operates under given conditions. Test your understanding of loop logic and how to implement it effectively.
