Shell script: Exiting the loop

The shell also uses break and continue to jump out of the loop.

Break command

In the following example, the script enters a dead loop until the user enters a number greater than 5, using break to jump out of the loop.

#!/bin/Bash while : Do    Echo-N"Input A number between 1 to 5:"Read Anum Case$aNuminch        1|2|3|4|5)Echo "Your number is $aNum!"        ;; *)Echo "You does not select a number between 1 to 5, the game is over!"Break ;; Esac Done

In a nested loop, the break command can also be followed by an integer that indicates a loop that jumps out of the first layer.

Break n

Here is an example of a nested loop, if Var1 equals 2, and var2 equals 0, jump out of the loop:

#!/bin/Bash forVar1inch 1 2 3 Do    forVar2inch 0 5    Do      if[$var 1-eq2-A $var 2-eq0 ]       Then Break2      Else         Echo "$var 1 $var 2"      fi    Done Done

Continue command

The continue command is similar to the break command, with only a little difference, and it does not jump out of all loops and just jumps out of the current loop.

Similarly, the continue can be followed by a number, indicating that the first layer jumps out of the loop.

Shell script: Exiting the loop