Why do all that when you can equally well use 
split -n 100 some_file

[download]
??

See man split... (on some *NIXes, -l is used instead of -n to specify the line count)

Update:

Qualified the usage of the line count option

A user level that continues to overstate my experience :-))

In reply to Re^3: split a file into number of file based on line count by Bloodnok
in thread split a file into number of file based on line count by asha80

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