return in function

Shell Programming and Scripting
1

I am using ksh. I want to know how can we make any function to return string or double value.
I dont want to use the global variables.

2

You cannot return a string from a ksh function. This is one way to do what you want.

#!/bin/ksh
myfunc()
{
    echo "$1 is the first parameter"

}

result=$(myfunc "one" "two" "three")
3

Thanks..
but it works for simple programs where there is only one echo. it wont work if i want to echo some other string..

For eg :

myfunc()
{
    echo "Inside myfunc()"
#  Do all the calc....
    echo "$1 is the first parameter"

}
result=$(myfunc "one" "two" "three")

And do you have any idea on how to return double values...

Thanks in adv.. :slight_smile:

Next time use CODE tags when posting code, data or logs to enhance readability and to preserve formatting like indention etc., ty.

4

Do you mean like this?

myfunc()
{
# Reverse the parameters
echo "$3 $2 $1"
}
result=$(myfunc "one" "two" "three")
#
echo "Result is: ${result}"


Result is: three two one
5

Lets c a simple eg:

function1()
{
echo "Hi there"
str="This is the string"
echo $str
}

now if I do ::
result=$(function1)
echo "Result is: ${result}"

It shows::
Result is: Hi there
This is the string

I need the output ::
Result is: This is the string

One more question..
What the procedure u all use to return a double value from a function.

Thanks

6

Why you have echo "Hi there" if you don't need it ?
If you like debug echo then print it to the stderr

  echo "Hi there" >&2

If you like to make function which return value, don't put anything else to the stdout.

Double ?
echo ...
or
printf
...
to the stdout
are method always. Commandline stdout to the variable. Function works like commands if we look calling line.