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iOS Objective-C Basics (Retired) Functional Programming in C While & Do While Loop

Question on "do" loop

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

Why wouldn't it loop through zero times, since i is set to 1 (it's not less than 1)?

2 Answers

When using a do { ... } while(...); syntax, the test for termination is performed at the end of each loop. Thus even if it starts off with the right condition to terminate, a single round of execution would still go before any test for termination. This is in contrast with the while(...){ ... } syntax, which performs the test before each loop.

Thanks so much, John!