UNIX in a Nutshell: System V Edition

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The awk Programming Language
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tolower

tolower(str)

Translate all uppercase characters in str to lowercase and return the new string.[6] {N}

[6] Very early versions of nawk don't support tolower() and toupper(). However, they are now part of the POSIX specification for awk, and are included in the SVR4 nawk.


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