It does not change the if statement rules, so
true must still be returned from the expression for the proceeding code to be executed. If, however, you
require code to be executed following a false conditional expression, you can use the else keyword,
which provides an alternative route of execution in your logic. The else keyword must immediately
follow the code or block executed by an if statement:
if ( 3 == 3 )
// if true, execute this line
else
// otherwise, execute this line
It is possible to nest if statements so that multiple conditions can be met before executing certain lines
of code:
if ( thatVar == thatValue )
{
if ( thisVar == thisValue )
{
// do code
}
}
Nesting if statements mean that the nested statement will only evaluate if the outer statement is true.
You can combine the expressions in the if statements to form a single expression using the conditional
operators. Therefore, you could rewrite the example as:
if ( thatVar == thatValue & & thisVar == thisValue )
{
// do code
}
76
Part I: The Core Language
When you combine expressions in this way, the expressions are still considered separate by the virtual
machine in terms of execution.
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