Put two or more variables together with the + method:


hi = "Hello, "
person = "Matz!"
puts hi + person # => Hello, Matz!

1.	Display a Message
2.	Insert some output from a shell command
3.	format a string with puts
4.	format based string interpolation
5.	Get the command line parameter
6.	Comparing Floating-Point Numbers
7.	Simple Arithmetic
8.	use parentheses
9.	Array on righthand side for multiple args
10.	%d for decimal integers
11.	hexadecimal integers
12.	uppercase hexadecimal integers
13.	octal integers string format
14.	full-length floating-point numbers
15.	force exponential notation
16.	exponential with uppercase E
17.	six significant digits
18.	Use %f or %e depending on magnitude
19.	Field width
20.	Float number Precision
21.	Field and precision combined
22.	Multiple arguments to be formatted

Put two or more variables together with the + method: : puts « Language Basics « Ruby