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→Using Variables in Shell Scripts
The positional parameter $0 refers to either the name of shell where command was issued, or name of shell script being executed.
If using positional parameters greater than 9, then you need to include number within braces.�Examples:��'''echo ${10}'''�, '''ls ${23}'''
The '''shift''' command can be used with positional parameters to shift positional parameters to the left by one or more positions.� There are a group of special parameters that can be used for shell scripting. A few of these special parameters and their purpose are displayed in the table below.
===Using Control Flow Statements in Shell Scripts===