A while loop
allows us to define a code block that will execute repeatedly as long as some
logical condition holds true. The form
that a while loop takes on is: while
(logical condition) { //
code block – the body of the loop //
contains 0 or more statements statement
1 statement
2 … statement
n } The way the
loop works can be best understood by the figure below that shows the flow in
the statement execution.
As you can
see, the conditional statement is evaluated first. If it’s true, the statements in the code
block defined by the loop (it’s called the body of the loop) are
executed in sequence, before the condition is evaluated again. If the condition is false, the statements
in the body of the loop are skipped over, and execution proceeds with the
next statement following the end of the block (indicated by the closing curly
brace). Terminology wise, each
execution of the statements in the body of the loop is referred to as a loop iteration. |
