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shell script for "for" loop

shell script for "for" loop# Unix - 噫吁兮，危乎高哉

b*l2003-10-30 08:10

1 楼

In this script:
for i in 1 2 3 4; do echo $i; done
It will print 1 2 3 4. But if I want to loop from 1 to N which is very large,
e.g, 100000, how to do that in bash or ksh using "for" loop? Is there anything
like "for i in 1:10000"? This one does not work.
3x

f*h2003-10-30 08:10

2 楼

you can increase i by i=`expr $i + 1`

【在 b***l 的大作中提到】

: In this script:
: for i in 1 2 3 4; do echo $i; done
: It will print 1 2 3 4. But if I want to loop from 1 to N which is very large,
: e.g, 100000, how to do that in bash or ksh using "for" loop? Is there anything
: like "for i in 1:10000"? This one does not work.
: 3x

b*l2003-10-30 08:10

3 楼

I used this approach in a while loop to do the same thing. But I am wondering
if there is a short cut other than this way.
Thanks any way.

large,
anything

【在 f********h 的大作中提到】

: you can increase i by i=`expr $i + 1`

c*t2003-10-30 08:10

4 楼

nope. That was the standard approach :)

【在 b***l 的大作中提到】

: I used this approach in a while loop to do the same thing. But I am wondering
: if there is a short cut other than this way.
: Thanks any way.
:
: large,
: anything