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# [[Ruby Math Functions and Methods]]<br><br>
# [[Understanding Ruby Logical Operators]]<br><br>
# [[Ruby Object Oriented Programming]]<br><br>
#* [[Ruby Object Oriented Programming|What is an Object?]]
#* [[Ruby Object Oriented Programming|What is a Class?]]
#* [[Ruby String Replacement, Substitution and Insertion|Reversing the Characters in a String]]<br><br>
# [[Ruby String Conversions]]
#* [[Ruby String ConversionConversions|Converting a Ruby String to an Array]]#* [[Ruby String ConversionConversions|Changing the Case of a Ruby String]]#* [[Ruby String ConversionConversions|Performing String Conversions]]<br><br>
# [[Ruby File and Directory Handling]]
