shell函数功能

funtion fname() {
    //do something
}

#!/bin/bash
# author : yonggang


function print_it(){
    echo -n "Your choice is : " 
}

case $1 in
    "one")
        print_it; echo $1;
        ;;
    "two")
        print_it; echo $1;
        ;;
    "three")
        print_it; echo $1;
        ;;
    *)
        echo "Usage $0 (one|two|three)"
        ;;
esac

[work@www sh]$ sh func.sh two
Your choice is : two
[work@www sh]$ sh func.sh one
Your choice is : one
[work@www sh]$

#!/bin/bash

# author : yonggang

function print_param(){
    echo "paramter number : " $#
    echo "first paramter : " $1
    echo "second paramter : " $2
    echo "all paramter : " $@
}

print_param one two three

[work@www sh]$ sh func.sh 
paramter number :  3
first paramter :  one
second paramter :  two
all paramter :  one two three
[work@www sh]$