mathΒΆ
Mathematical expressions.
math(EXPR <output-variable> <math-expression>)
EXPR evaluates mathematical expression and returns result in the
output variable. Example mathematical expression is 5 * (10 + 13).
Supported operators are +, -, *, /, %, |, &,
^, ~, <<, >>, and (...). They have the same meaning
as they do in C code.