you can put two or more commands on the same line separated by the semicolon. … All the commands will be executed sequentially waiting for each command to finish before starting the new one.
What does semicolon do in 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.
What does a semicolon mean in Bash?
When the shell sees a semicolon (;) on a command line, it’s treated as a command separator — basically like pressing the ENTER key to execute a command. … You’ll see all of them on the same command line and they’ll be grouped together in the history list (Section 30.7).
Do I need semicolon Bash?
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.
What is a semicolon in code?
The Semicolon lets the compiler know that it’s reached the end of a command. Semicolon is often used to delimit one bit of C++ source code, indicating it’s intentionally separated from the respective code.
What is && in bash?
4 Answers. “&&” is used to chain commands together, such that the next command is run if and only if the preceding command exited without errors (or, more accurately, exits with a return code of 0).
What is bash set?
set is a shell builtin, used to set and unset shell options and positional parameters. Without arguments, set will print all shell variables (both environment variables and variables in current session) sorted in current locale. You can also read bash documentation.
Can you use three semicolons in one sentence?
In this context, it’d be ok to use multiple ones in the list but not ok to use them to link sentences (this being the general rule – let me flesh this one out below).
What does double semicolon mean?
A “double semicolon” does not have any special meaning in c. The second semicolon simply terminates an empty statement. So you can simply remove it.
What does double semicolon mean in Java?
As told by other answers, usually the second semicolon is interpreted as an empty statement, which is permissible where ever a statement is permissible. Actually, there are cases where a double semicolon does produce an error: public int method() { return 1;; }