Math operator in a Shell Script

Operators

The shells use arithmetic operators from the C programming language, in decreasing order of precedence. Math Operators

OPERATOR	DESCRIPTION
++−−</editor Query >	Auto-increment and auto-decrement, both prefix and postfix
+	Unary Plus
−	unary minus
! ~	Logical negation; Binary inversion (one ' s complement)
* / %	multiplication; Division; Modulus (remainder)
+−	addition; Subtraction
<< >>	Bitwise left shift; Bitwise RIGHT SHIFT
<= >=	Less than or equal to; Greater than or equal to
< >	Less than; Greater than
== !=	equality; Inequality (both evaluated left-to-right)
&	Bitwise and
^	Bitwise Exclusive OR
|	Bitwise OR
&&	Logical and
||	Logical OR

Math operator in a Shell Script