Ruby supports all the features because it is a object oriented programming language.

Easier way to comment multiple lines.

floating point literals are valid only when they have digits on both the sides of decimal point.

It finds the length of string.

Quotation marks are used only with strings.

As 77 is less than 78 hence the boolean value will be printed as true.
Output:
True

Print prints whatever is given and puts in addition to printing it inserts a new blank line.

It is used for modifying the variable.

#{expr} is valid.

There is no predefined method named irreverse in ruby.
Output:
undefined method `irreverse' for "eric":String