Shell 编程基础之 Break, Continue 练习

一、语法

break：用来跳出循环。break N 可以跳出多层循环

break

break N

continue：用来跳过循环。continue N 可以跳过多层循环

continue

continue N

二、详细与区别

1. break

   for var1 in 1 2 3
   do
     for var2 in 0 5
     do
       if [ "$var1" -eq "2" -a "$var2" -eq "0" ]; then
         break 2
       else
         echo "$var1 $var2"
       fi
     done
   done

   [email protected]:~$ ./test.sh
   1 0
   1 5

2. continue

   for var1 in 1 2 3
   do
     for var2 in 0 5
     do
       if [ "$var1" -eq "2" -a "$var2" -eq "0" ]; then
         continue 2
       else
         echo "$var1 $var2"
       fi
     done
   done

   [email protected]:~$ ./test.sh
   1 0
   1 5
   3 0
   3 5