Scalar

1. Commonly refers to a single number or value.
2. In Perl 5 and above, a scalar is a single value that is not an array. A scalar may be string, integer, or a floating-point. For example, "my $value="example";" is an example of a scalar in Perl, where $value is equal to the string 'example'.

Also see: Array, Perl, Programming definitions, Variable