Syntax of the while statement

Here is the syntax for the while statement:

while ( condition )
  statement 

Notes:

• The condition is a Boolean expression: something that evaluates to true or false.
• The condition can be complicated, using many relational operators and logical operators.
• The statement is a single statement. However it can be (and usually is) a block statement containing several other statements.
• The statement is sometimes called the loop body.

Since the statement can be a single statement or a block statement, a while statement looks like either of the following:

while ( condition )
  statement;

while ( condition )
{
  one or more statements
}

The style of indenting used here leads to fewer errors than alternative styles.