How to give a variable output name in a shell script inside a for loop


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# 1  
How to give a variable output name in a shell script inside a for loop

Hi all

I run my program prog.c in the following way :

PHP Code:
$ ./prog 1 output.txt 
where 1 is a user defined initial value used by the program.

But now I want to run it for many a thousand initial values, 1-1000, and store all the outputs in different files.
Like


PHP Code:
$ ./prog 1 output1.txt 
$ ./prog 2 output2.txt 
$ ./prog 3 output3.txt 
.
 
.
$ ./
prog 1000 output1000.txt 
I know how to use the for loop in a shell script but dont know how to give a variable output name.

Please give me a small example
PLEASE HELP

Regards
Alice
# 2  
Using bash shell
Code:
 for i in {1..1000};do ./prog $i > output$i.txt;done

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