Name
for
Synopsis
for ((init
;cond
;incr
)) docommands
done
Arithmetic for loop, similar to C’s. Evaluate init. While cond is true, execute the body of the loop. Evaluate incr before retesting cond. Any one of the expressions may be omitted; a missing cond is treated as being true.
Example
Search for a phrase in each odd chapter:
for ((x=1; x <= 20; x += 2)) do grep $1 chap$x done
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