Recursive way?

[trume]

Hello,

How can I do it on a recursive way? (Function ''plus'' needs to call itself)

#!/bin/bash
function plus
{
	let GLOBAL=$GLOBAL+$1
}
GLOBAL=0
n=$1
for ((i=1; i<=n; i++))
do
plus $i
done
echo Answer: $GLOBAL

Any help is welcome!

Regards,
trume

[danuz]

.

[trume]

Yes, but your code wasn't have correct function. It needs to be as most similar to mine ( SUM ).

[shibblez]

Put

set -xv

as your second line. You can now see what is happening as it executes. A clue -

plus $i

doesn't do what you think it does.

[trume]

Actaully, I need suggestions about the recursion. How to make function will call itself...

[griswolf]

There are many shells. Which one are you using?
The normal meaning for PLUS parameters is" Return the sum of all the parameters", so the recursive way would be to

• return PLUS (first+second) rest of the parameters
• Or calculate (i, i+1) for i in the proper range and return PLUS pair-sums

Or something that does part of the work now and defers some of the work to a call of itself.