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iOS Objective-C Basics (Retired) Functional Programming in C Loops

Markus Reiter
Markus Reiter
1,123 Points
Posted by Markus Reiter
Markus Reiter
1,123 Points

Wrong Answer?

I think the answer to this question is zero, but it shows wrong.

How many times will the following loop execute?

int i = 1; do { printf("looping"); } while ( i < 1 );

3 Answers

Dane Parchment
MOD
Dane Parchment
Treehouse Moderator 11,075 Points
Dane Parchment
Dane Parchment
Treehouse Moderator 11,075 Points

Remember a do-while loop always executes the task at least once before actually looking at the loop conditions.

Michael Hulet
Michael Hulet
47,912 Points
Michael Hulet
Michael Hulet
47,912 Points

It will execute once. Using do{}while(); syntax guarantees that the block of code executes at least once, as the condition is evaluated after the code runs. So even though the condition evaluates to false the first time, printf("looping"); had already run once by the time that i < 1 was evaluated

Markus Reiter
Markus Reiter
1,123 Points
Markus Reiter
Markus Reiter
1,123 Points

Thanks for the clarification.