Scalar Variables and Operators

Scalar Operators for Numbers

• Valid Arithmetical Operators for Scalar Numbers: Return numerical result of operation.

  Table of Arithmetical Operators for Scalar Numbers

  Operator Symbol	Operation
  +	Addition
  -	Subtraction
  *	Multiplication
  /	Division
  **	Exponentiation
  %	Modulus (remainder)

• Examples:
  3 + 5 # Three plus five (will be equal 8)
  2 ** 3 # Two to the third power (will equal 8)
  17 % 7 # Remainder when 17 is divided by 7 (will equal 3)
  
• Valid Logical Operators for Scalar Numbers: Return true or false.

  Table of Logical Operators for Scalar Numbers

  Operator Symbol	Operation
  ==	Logical Equal To
  <	Logical Less Than
  >	Logical Greater Than
  <=	Logical Less Than or Equal
  >=	Logical Greater Than or Equal
  !=	Logical Not Equal

• Examples:

  3 < 5 # Three is less then five (will be true)
  2 >= 3 # Two is greater then or equal three (will be false)
  17 != 7 # Seventeen is not equal to 7 (will be true)
  

• Remember that all numbers are internally represented as a double precisions float, so you may get occasional weirdness with numbers not being exact (for example 1/3). The good news is that you almost always see what you would expect in normal usage.