The elsif Statement

if (condition-1) {
    [ statements-1 ]
elsif (condition-2) {
    [ statements-2 ]
else {
    [ statements-3 ]

An elsif statement is used to evaluate a subsequent condition after a preceding if statement evaluates to false. In the example above, when condition-1 evaluates to false, then statements-1 are skipped and condition-2 is checked. When condition-2 evaluates true, then statements-2 are executed. When condition-2 evaluates false, then statements-2 are skipped and statements-3 are executed.

As with if, an elsif clause does not need to be followed by an else statement. However, any else statement must be the last statement in an elsif chain. An arbitrary number of elsif statements can be chained together to create a series of conditional checks and statements.