BASH ,"touch" and "ln-s" inside for loop

Question

while running this code , I get this error:

syntax error near unexpected token (' touch FILE$i FILE($i+1);'

what is wrong ?

#!/bin/bash

  for ((i=1; i<=99; i++ ));
    do        
    touch FILE$i FILE($i+1);
    ln -s FILE$i FILE($i+1);
       
     done

Off-topic: When you are going to ln -s FILE 1 FILE2, you do not need to touch FILE2 first. Your code is trying to make a chain of symbolic links. Are you sure you want that, or do want FILE2,..,FILE99 all linked to FILE1. In that case you might want touch FILE1; for ((i=2;i<=99;i++));do ln -s FILE$i; done. — Walter A
– Walter A, Commented Nov 1, 2020 at 13:17

glenn jackman · Accepted Answer · 2020-11-01 11:10:13Z

1

To do arithmetic, use the $((...)) syntax:

    touch FILE$i FILE$(($i+1))

answered Nov 1, 2020 at 11:10

glenn jackman

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