Strings with all letters converted to lower case. Numbers in integer form. Floating point numbers are truncated.
This function converts any upper case letters in a string to lower case. It will also convert numbers to their base 10 integer representation.
Gamma> tolower("Jack works for IBM.");
"jack works for ibm."
Gamma> tolower("UNICEF received $150.25.");
"unicef received $150.25."
Gamma> tolower(5.3);
5
Gamma> tolower(0b0110);
6
Gamma>