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Arithmetic & Relational Operators

Coding: Introduction to Python v3, topic 1.5.1

Arithmetic Operators

Operators are symbols that represent a specific function within a program.

Basic operators

Basic operators

  • Addition is done using a + sign.
  • Subtraction is done using a - sign.
  • Division is done using a / sign.
  • Multiplication is done using a * sign.
  • Exponentiation is done using a ** sign.
Modulo operator

Modulo operator

  • The modulo operator gives the remainder of the division of two numbers.
  • For example:
  • 5 % 2 would be equal to 1.
Integer division

Integer division

  • The integer division operator returns the quotient (whole part) of a division.
  • For example:
  • 5 // 2 would give 2.

Relational Operators

Relational operators compare two values, and produce a True or False value.

Equality

Equality

  • We can test if two values are equal using the equality operator. For example:
  • 2 == 2 would evaluate to True.
  • We can test if two values are not equal using the not-equal-to operator:
  • 2 != 2 would evaluate to False.
Comparison

Comparison

  • We can compare two numbers using the less than and greater than signs. For example:
  • 2 < 3 evaluates to True.
  • 2 > 3 evaluates to False.
  • We can test for less than or equal, or greater than or equal like this:
  • 2 <= 3 evaluates to True.
  • 3 >= 3 evaluates to True.

Test yourself on Arithmetic & Relational Operators

  • What is the result of 17 % 5?

  • Which of the following statements are correct of arithmetic operators?

  • The // operation performs which operation?

  • Which of these is the correct operator for 'not equal to'?

  • Toggle until all are correct: Which of these statements evaluates to True?

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