Loops
A loop can execute a statement or group of statements multiple times and the following is the general from of a loop statement in most programming languages.
While Loop
A while
loop statement repeatedly executes the code block within as long as the condition is true. The moment the condition becomes false, the program will exit the loop.
Note: The
while
loop might not ever run. If the condition is initiallyfalse
, the code block will be skipped.
while (password != 1234) {std::cout << "Try again: ";std::cin >> password;}
For Loop
A for
loop executes a code block a specific number of times. It has three parts:
- The initialization of a counter
- The continue condition
- The increment/decrement of the counter
This example prints 0 to 9 on the screen:
for (int i = 0; i < 10; i++) {std::cout << i << "\n";}
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