Question

Unit 7 Discussion - UNIX / LINUX Operators 1212 unread replies.1616 replies. Topic: In Unix/Linux, Bash Shell operators are divided into various operational functions like defining, evaluating, arithmetic and relational, and redirection operations used by system administrators, for example, the ‘$’ (Dollar sign) in front of a variable is used to evaluate operators. Discuss the best operator for ‘defining’ operators and provide few working examples.

Answer 1

Ans:-

operator description example

+ (Addition) Adds values on either side of the operator expr $a + $b` will give 30

- (Subtraction) Subtracts right hand operand from left hand operand expr $a - $b` will give -10

* (Multiplication) Multiplies values on either side of the operator `expr $a \* $b` will give 200

/ (Division) Divides left hand operand by right hand operand `expr $b / $a` will give 2

% (Modulus) Divides left hand operand by right hand operand and returns `expr $b % $a` will give 0

remainder  

= (Assignment) Assigns right operand in left operand a = $b would assign value of b into a

== (Equality) Compares two numbers, if both are same then returns true. [ $a == $b ] would return

false.

!= (Not Equality) Compares two numbers, if both are different then returns true. [ $a != $b ] would return

true.