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expr [shell]

Operators

Addition

op_1 + op_2

Subtraction

op_1 - op_2

Equality

op_1 = op_2

Greater than

op_1 > op_2
Be sure to correctly escape the operator, if needed.

Smaller than

op_1 < op_2
Be sure to correctly escape the operator, if needed.

Inequality

op_1 != op_2

Multiplication

op_1 * op_2
Be sure to correctly escape the operator, if needed.

Division

op_1 / op_2

Modulus

op_1 % op_2

Regular Expresion

op_1 : op_2