Linux Shell Scripting Essentials

Operators

Similar to other programming languages, shell programming also supports various types of operators to perform tasks. Operators can be categorized as follows:

• Assignment operator
• Arithmetic operators
• Logical operators
• Comparison operators

The assignment operator

Equal to an operator (=) is the assignment operator that is used to initialize or change the value of a variable. This operator works on any data such as a string, integer, float, array, and so on. For example:

$ var=40           # Initializing variable var to integer value
$ var="Hello"    # Changing value of var to string value
$ var=8.9        # Changing value of var to float value

Arithmetic operators

Arithmetic operators are used for doing arithmetic operations on integers. They are as follows:

• + (plus) ...