Each bash shell function has the following set of shell variables:
| Tutorial details | |
|---|---|
| Difficulty | Easy (rss) |
| Root privileges | No |
| Requirements | Bash |
| Time | N/A |
Example
Create a shell script as follows:
#!/bin/bash # Purpose: Demo bash function # Author: nixCraft # ----------------------------- ## Define a function called foo() foo(){ echo "Function name: ${FUNCNAME}" echo "The number of positional parameter : $#" echo "All parameters or arguments passed to the function: '$@'" echo } ## Call or invoke the function ## ## Pass the parameters or arguments ## foo nixCraft foo 1 2 3 4 5 foo "this" "is" "a" "test"
Run it as follows:
$ chmod +x script.name.here
$ ./script.name.here
Sample outputs:
Fig.01: Bash function displaying number of arguments passed to foo()
See also
- Chapter 9: Functions from the Linux shell scripting wiki.
- man page – bash
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Try using the special variable ${#}.
function foo {
echo “N. of Args: ${#}”
}
$ foo a b c
3