1. Perl
  2. Syntax
  3. context
  4. here

Scalar context

Perl has a concept called context, and the context that is evaluated as a scalar is called a scalar context .

Assignment to a scalar variable

Assignment to a scalar variable is a scalar context. Array returns the length of the array when evaluated in a scalar context.

my $num = @values;

Comparison operator term

The left and right terms of comparison operator are scalar contexts.

$x <@values
$x == @values

I often see it in the loop of for statement.

for (my $i = 0; $i < @nums; $i++) {

if condition part

The conditional part of if is the scalar context. In the following, @values is evaluated in scalar context, so it returns the number of arrays.

if (@values) {

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