#!/bin/sh
w=1
echo $w
w=`expr $w + 1`
echo $w
w=`expr $w + 1`
echo $w
N=SCT${w}
echo $N
w=`expr $w + 1`
N=SCT${w}/Loop
echo $N


----------------------------------
$ source SCT.sh
1
2
3
SCT3
SCT4/Loop