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Do we use semicolon in shell script?
1 Answer. A semicolon or ampersand ( ; or & ) in a shell script is a command terminator. You can’t use it if it doesn’t follow a command. ; means “run the preceding command in the foreground” and & means “run the preceding command in the background”. A newline in a shell script is a “weak” command terminator.
Is semicolon mandatory in bash script?
The double semicolon is also useful as it leaves no ambiguity in the code. It is required as it is used at the end of each clause as required by the bash syntax in order to parse the command correctly. It is only used in case constructs to indicate that the end of an alternative.
Can I use two semicolons in one sentence?
Yes, semicolons can be used to connect three, or more, related independent clauses.
What does a semicolon mean in a shell script?
A semicolon or ampersand (; or &) in a shell script is a command terminator. You can’t use it if it doesn’t follow a command. ; means “run the preceding command in the foreground” and & means “run the preceding command in the background”. A newline in a shell script is a “weak” command terminator.
When do you get a missing semicolon in JavaScript?
The JavaScript exception “missing ; before statement” occurs when there is a semicolon (;) missing somewhere and can’t be added by automatic semicolon insertion (ASI). You need to provide a semicolon, so that JavaScript can parse the source code correctly. SyntaxError.
Is the newline after Cat a semicolon or a newline?
A newline in a shell script is a “weak” command terminator. If there is a command to terminate, it’s equivalent to a semicolon. If there is no command to terminate, the newline has no effect. The newline after cat < > /home/$user/public_html/.htaccess terminates the cat … command.
Why are semicolons at the end of a line superfluous?
Single semicolons at the end of a line are superfluous, since the newline is also a command separator. case specifically needs double semicolons at the end of the last command in each pattern block; see help case for details. metacharacter A character that, when unquoted, separates words.