leejunkim

Loops - c

1 min read

while

  • Use when you want a loop to repeat an unknown number of times & possibly not at all
while (condition) {
    // code to be executed...
}

do while

  • Use when you want a loop to repeat an unknown number of times but at least once
    • like prompting user for input
do {
    // code to be executed...
} while (condition); // <-- Don't forget the semicolon!

for loop

for (start; expr; increment) {
 
}
  • steps
    • start is executed
    • expr is checked
      • if it is true, the body of the loop executes
        • Then, the increment is executed
      • if it is false, the body of the loop does NOT execute and the for loop finishes
  • Use when you want a loop to repeat a discrete number of times, though you many not know the number at the moment the program is compiled

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