for loop in shell script

for loop in shell script

# variable1: x1, x2
# variable2: 100~10000,step=1000
# variable3: 10~100,step=10

for x in x1 x2
do
        for ((y=100;y<=10000;y=y+1000))
        do
                for ((z=10;z<=100;z=z+10))
                do
                        echo "$x" "$y" "$z"                     
                done
        done
done