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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; }
condition
The while loop will execute at least once even if the condition is FALSE.
False
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?
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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.
