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Ruby » Language Basics » puts 




1.Display a Message
2.Insert some output from a shell command
3.Put two or more variables together with the + method:
4.format a string with puts
5.format based string interpolation
6.Get the command line parameter
7.Comparing Floating-Point Numbers
8.Simple Arithmetic
9.use parentheses






10.Array on righthand side for multiple args
11.%d for decimal integers
12.hexadecimal integers
13.uppercase hexadecimal integers
14.octal integers string format
15.full-length floating-point numbers
16.force exponential notation
17.exponential with uppercase E
18.six significant digits
19.Use %f or %e depending on magnitude
20.Field width
21.Float number Precision
22.Field and precision combined
23.Multiple arguments to be formatted
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