Combing the basic knowledge of shell script & lt; Nine & gt;:break jumps out of the whole cycle; continue jumps out of this cycle
The break command allows you to jump out of all loops (terminate the execution of all subsequent loops)
#! / bin/bash
While:
Do
Echo-n "enter a number between 1 and 5:"
Read aNum
Case $aNum in
1 | 2 | 3 | 4 | 5) echo "the number you entered is $aNum!"
*) echo "the number you entered is not between 1 and 5! game over"
Break
Esac
Done
Break instance 2
#! / bin/bash
I, 1
For day in mon tue wed thu fri
Do
Echo "Weeking $((iTunes +)): $day"
If [$I-eq 3]; then
Break
Fi
Done
Execution result
[root@zabbix shell] # sh break.sh
Weeking 1: mon
Weeking 2: tue
The continue command is similar to the break command, except that it does not jump out of all loops, just out of the current loop.
Modify the above example:
#! / bin/bash
While:
Do
Echo-n "enter a number between 1 and 5:"
Read aNum
Case $aNum in
1 | 2 | 3 | 4 | 5) echo "the number you entered is $aNum!"
*) echo "the number you entered is not between 1 and 5!"
Continue
Echo "Game over"
Esac
Done
Contibue instance 2
#! / bin/bash
I, 1
For day in mon tue wed thu fri sat sun
Do
Echo-n "Day $((iTunes +)): $day"
If [$I-eq 7-o $I-eq 8]; then
Echo "(WEEKEND)"
Continue
Fi
Echo "(weekday)"
Done
Execution result
[root@zabbix shell] # sh break.sh
Day 1: mon (weekday)
Day 2: tue (weekday)
Day 3: wed (weekday)
Day 4: thu (weekday)
Day 5: fri (weekday)
Day 6: sat (WEEKEND)
Day 7: sun (WEEKEND)
