Examples:

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• 2'100 : 4 in binary notation.
• 0b100 : 4 in binary notation.
• 8'73 : 59 in octal notation.
• 0o73 : 59 in octal notation.
• 16'f7: 247 in hexadecimal notation.
• 0xf7: 247 in hexadecimal notation.
• 0'a: the code of 'a', which is 97.

  
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A floating-point number consists of an integer (optional), then a decimal point and then another integer followed optionally by an exponent. For example, 23.2, 0.23, 23.0e-10 are valid floating-point numbers.