(exclamation mark). This character combination has a special meaning when it is used in the very first line of the script. It is used to specify the interpreter with which the given script will be run by default. So, if the first line of a script is: #!/bin/bash It means the inter...
Using parentheses around the function arguments in Perl is considered good practice but isn’t strictly mandatory. Notice the newline character (\n) in the string literal and the semicolon (;) at the end of the line, which terminates the statement. ...