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C++ Tutorial

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C++ while Keyword

❮ C++ Keywords

Example

Print the numbers 0 to 4:

int i = 0;
while (i < 5) {
  cout << i << "\n";
  i++;
}

Try it Yourself »

Definition and Usage

The while loop loops through a block of code as long as a specified condition is true.

Note: Do not forget to increase the variable used in the condition, otherwise the loop will never end!

More Examples

The do/while loop is a variant of the while loop. This loop will execute the code block once, before checking if the condition is true, then it will repeat the loop as long as the condition is true:

Example

int i = 0;
do {
  cout << i << "\n";
  i++;
}
while (i < 5);

Try it Yourself »

Related Pages

Read more about while loops in our C++ While Loop Tutorial.

Read more about do/while loops in our C++ Do/While Loop Tutorial.

❮ C++ Keywords