Variables, expressions and statements: operators¶
Learning objectives
- Get the type of an object
- Create a variable
- Use a variable
- Practice converting an equation to Python code
- Find and use the operator for exponentiation
- Practice the modulo operator
- Practice converting a simple text question to Python code
For teachers
Teaching goals are:
- Learners have worked with variables
- Learners understand the purpose of variables
- Learners have obtained the data type of a variable
- Learners have heard about what a data type is
- Learners have practiced convert an equation and a text question to Python
- Learners have read on operators
- Learners have worked with the modulo operator
Lesson plan:
Exercise 1:
- 5 mins: prior knowledge
- 5 mins: presentation
- 15 mins: challenge
- 5 mins: feedback
Exercise 2 and 3:
- 5 mins: prior knowledge
- 5 mins: presentation
- 15 mins: challenge
- 5 mins: feedback
Exercise 4:
- 5 mins: prior knowledge
- 5 mins: presentation
- 15 mins: challenge
- 5 mins: feedback
Overview¶
In any non-trivial calculation, we want to let our computer remember things, such as the content of a data file, or the parameters/settings we use in our program. Variables allows one to make a computer store ('remember') information. Here we use our first simple variables.
Also we practice converting an equation and a mathematical problem to Python code. We will discover the helpful modulo operator.
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variables ~~~ uppmax
Exercises¶
See the exercise procedure here.
Exercise 1: an equation with exponentiation¶
Learning objectives
- practice converting an equation to Python code
- find and use the operator for exponentiation
Read the following sections of How to Think Like a Computer Scientist: Learning with Python 3:
- 2.6. Operators and operands
Then in section 2.14, do exercise 5 except for asking for input: use a hardcoded value as input, for example:
Exercise 2: the modulo operator¶
Learning objectives
- practice the modulo operator
- practice converting a simple text question to Python code
Read the following sections of How to Think Like a Computer Scientist: Learning with Python 3:
- 2.8. Order of operations
- 2.12. The modulus operator
Then in section 2.14, do exercises 5 and 6.