2.3.17.1. - Conditional Statement
The forms of the conditional statement are
if ( expression ) statement if ( expression ) statement else statementThe
expression
is evaluated in both cases.
If nonzero, the first
statement
is executed.
In the second form, if
expression
is zero, the second
statement
is executed.
Each
else is always matched
with the last
else-less
if within the same statement block.