Shell break statement memo

1. Shell commands: Common commands and built-in commands.
   
2. External commands: commands that can be executed at the command prompt.
3. Built-in commands: Implemented in shell, cannot be called as an external program.
4. The internal or external commands are generally not of much importance, but internal commands are more efficient to execute.
5. Common commands used in shell programming:
6. 1,
   Break
   
   
   Command
7. Use this command
   For
   
   
   /
   While
   
   
   Exit in the/Until loop. You can also add numeric parameters to indicate the number of layers that exit the loop (
   Break
   
   
   2) Exit A loop without adding parameters.
8. Example:
    
9. #! /Bin/sh
   
    
10. # This is a example for the instruction of "break"
    
    
    
12. Var1 = 1
13. Var2 = 1
14. While
    
    
    [Var1-le 10]
15. Do
    
    
    
16. 
    While
    
    
    [Var2-le 10]
17. 
    Do
    
    
    
18. Echo
    "Var1 =1 {var1} var2 =$ {var2 }"
    
    
19. Var1 = ($ var2 + 1 ))
20. 
    If
    
    
    [Var2-EQ 8]; then
21. 
    Break
    
    
    2
22. Fi
23. Done
24. Var2 = ($ var1 + 1 ))
25. Done
27. Exit 0