Float number Precision : puts « Language Basics « Ruby






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Float number Precision


puts '%.2f' % 123.456  # '123.46': two digits after decimal place
puts '%.2e' % 123.456  # '1.23e+02': two digits after decimal = three significant digits
puts '%.6e' % 123.456  # '1.234560e+02': note added zero
puts '%.4g' % 123.456  # '123.5': four significant digits








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4.format a string with puts
5.format based string interpolation
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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.Field and precision combined
22.Multiple arguments to be formatted