SC2113

function keyword is non-standard. Use foo() instead of function foo.

Problematic code:

#!/bin/sh
function hello {
    echo "Hello World"
}

Correct code:

#!/bin/sh
hello() {
    echo "Hello World"
}

### Rationale:

`function` is a non-standard keyword that can be used to declare functions in Bash and Ksh.

In POSIX `sh` and `dash`, a function is defined without a `function` keyword. Instead, the function name is followed by `()` as in the correct example.

### Exceptions:

None

### Related resources:

* Help by adding links to BashFAQ, StackOverflow, man pages, POSIX, etc!