String concatenation operators String concatenation operators
These operators concatenate strings. The syntax is: <target> .= <right_operand> <target> << <right_operand> <target> <, <right_operand> Operator .= appends <right_operand> to <target>. Operator << appends a space followed by <right_operand> to <target> if <target> is non empty, otherwise sets <target> to <right_operand>. Operator <, is similar to << but uses a comma to separate the two variable contents. The last two operators are useful in creating space-separated or comma-separated lists.
Examples
%a = "" %a << free echo %a %a .= bsd echo %a %a << rox echo %a %a <, but linux is better! echo %a
See also
Operators

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