Creating many O/P files from one I/P 1

[jennyj]

I am fairly new to awk/nawk and our expert is away on holiday, so I hope someone can help.

I have an input file eg

001,ABC,99900003,500042949,CHRIS
001,CDE,99900011,500042999,DAVID
002,ABC,99900099,500099999,JAMES
003,ZZZ,99900088,500088888,PAUL

I need to create a separate output file dependant on the first 3 characters
eg all 001 lines to be written to file "output.001"
all 002 lines to be written to file "output.002"
etc

Hope you can help
Thanks
jennyj

 

[Ygor]

Perhaps just...

awk -F, '{print > "output." $1}' infile

 

[jennyj]

Brilliant, that works fine.
I had been trying to work out a loop routine instead of keeping it simple.
Many thanks
jennyj