#!/bin/bash

# break n，默认为1

for (( a = 1; a <= 3; a ++ ))
do
    echo "Outer loop : $a"
    for (( b = 1; b < 100; b ++ ))
    do
        if [ $b -gt 4 ]
        then
            break 2
        fi
        echo " Inner loop:$b"
    done
done