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並前往https://superuser.com/questions/1436058/bash-increment-variable-inside-while-loop-and-display-the-value-outside-the-loo

linux - Bash: Increment variable inside while loop and display ...

Both... cnt=0 while [ $cnt -lt 10 ] do ((cnt++)) done echo $cnt ...and... cnt=0 while [ $cnt -lt 10 ] do let cnt=cnt+1 done echo $cnt.

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