PYTHON TUTORIALS

How and When to Use Arithmetic Operators

Summary

• If you want to add two values, use the following syntax:
  [number] + [number]
  OR
  [variable1] + [variable2]
• If you want to subtract two values, use the following syntax:
  [number] - [number]
  OR
  [variable1] - [variable2]
• If you want to multiply two values, use the following syntax:
  [number] * [number]
  OR
  [variable1] * [variable2]
• If you want to divide two values, use the following syntax:
  [number] / [number]
  OR
  [variable1] / [variable2]
• If you want to divide two numbers and only get the whole number that goes into the numerator, use the following syntax:
  [number] // [number]
  OR
  [variable1] // [variable2]
• If you want to divide two numbers and get the remainder, use the following syntax:
  [number] % [number]
  OR
  [variable1] % [variable2]
• If you want to exponentiatea number by a certain value, use the following syntax:
  [number] ** [exponent_value]
  OR
  [variable1] ** [exponent_value]
• NOTE: You can override a variable's value by re-declaring it. Example:
  quantity = 5
quantity = quantity * 2

How and When to Use Relational Operators

Summary:

• Relational Operators are use to create an expression that is used to test a relation between two operands (typically variables or conditions) to evaluate whether the test is True or False.
• If you want to see if a variable is equal to another variable or a static value, use the following syntax:
  [variable1] == [value]
  OR
  [variable1] == [variable2]
• If you want to see if a variable is not equal to another variable or a static value, use the following syntax:
  [variable1] != [value]
  OR
  [variable1] != [variable2]
• If you want to see if a variable is greater than another variable or a static value, use the following syntax:
  [variable1] > [value]
  OR
  [variable1] > [variable2]
• If you want to see if a variable is less than another variable or a static value, use the following syntax:
  [variable1] < [value]
  OR
  [variable1] < [variable2]
• If you want to see if a variable is greater than OR equal to another variable or a static value, use the following syntax:
  [variable1] >= [value]
  OR
  [variable1] >= [variable2]
• If you want to see if a variable is less than OR equal to another variable or a static value, use the following syntax:
  [variable1] <= [value]
  OR
  [variable1] <= [variable2]

Exercise

Congratulations! You just completed the Operators Tutorial! To help test your knowledge, let's practice creating some Arithmetic and Relational Expressions.
**It's highly recommended that you complete the exercise outlined in the previous tutorial before beginning this exercise.**

Instructions:

1. Open your IDE (e.g., VS Code, PyCharm, Spyder).
2. Create a New Python File. Name it "operators.py"
3. In the Newly Created Python File, complete the following tasks:
1. Declare a variable named "retail_price" and give it a value of 19.99.
2. Declare a variabled named "discounted_price" and give it a value of 14.99.
3. Declare a variable named "discount_rate" and give it a value of 0.25.
4. Create a Relational Expression that Shows Whether the "retail_price" variable is less than or equal to the "discounted_price" variable. Output the result.
5. Create a Relational Expression that Shows Whether the "discount_rate" variable is greater than 1. Output the result.
6. Give the "discounted_price" a new value by multiplying the "retail_price" variable by the "discount_rate" variable. Output the result.
4. Exercise Completed! Click here to view the answers.

Have any issues with the above exercise? Post your question on Discord!