‘function’(함수) 사용방법에 대해 알아보겠습니다.
예제.1 - Create Function
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| #!/bin/bash
function F1()
{
echo 'I like bash programming'
}
F1
|
I like bash programming
예제.2 - Create function with Parameters
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| #!/bin/bash
Rectangle_Area() {
area=$(($1 * $2))
echo "Area is : $area"
}
Rectangle_Area 10 20
|
Area is : 200
예제.3 - Pass Return Value from Function
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| #!/bin/bash
function greeting() {
str="Hello, $name"
echo $str
}
echo "Enter your name"
read name
val=$(greeting)
echo "Return value of the function is $val"
|
Enter your name
kim
Return value of the function is Hello, kim
예제.4 - Using Global Variable
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| #!/bin/bash
function F1()
{
retval='I like programming'
}
retval='I hate programming'
echo $retval
F1
echo $retval
|
I hate programming
I like programming
예제.5 - Using Function Command
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| #!/bin/bash
function F2()
{
local retval='Using BASH Function'
echo "$retval"
}
getval=$(F2)
echo $getval
|
Using BASH Function
예제.6 - Using Variable
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| #!/bin/bash
function F3()
{
local arg1=$1
if [[ $arg1 != "" ]];
then
retval="BASH function with variable"
else
echo "No Argument"
fi
}
getval1="Bash Function"
F3 $getval1
echo $retval
getval2=$(F3)
echo $getval2
|
BASH function with variable
No Argument
예제.7 - Using Return Statement
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| #!/bin/bash
function F4() {
echo 'Bash Return Statement'
return 35
}
F4
echo "Return value of the function is $?"
|
Bash Return Statement
Return value of the function is 35