while里面嵌套for循环

#!/bin/bash

# placing a for loop inside a while loop

var1=5

while [ $var1 -ge 0 ]
do
    echo "Outer loop: $var1"
    for (( var2=1; $var2 < 3; var2++))
    do
        var3=$[ $var1*$var2]
        echo "Inner loop: $var1 * $var2 = $var3"
    done
    var1=$[ $var1 - 1 ]
done