Computer Science

compare two values and produce the result of True or False

an expression that evaluates to True or False

used when there is more than one possible path for a program to follow

Relational operators

Using selection when developing programs

Arithmetic operators

Logical operators

Nested selection

Good programming practices

Selection challenge

Programming project: selection I

Programming project: selection II

In this unit pupils will explore the benefits of good programing practices and why subroutines are used in programs. They will create conditions in programs which use arithmetic, relational and logical expressions. They will develop their understanding of selection and explore nested selection.

Programming: selection

compare two values and return True or False

What do relational operators do in a program?

What is the result of the expression `15 > 12`?

The correct way to check if age is greater than 18 in Python is `if age ___ 18:`

What will be displayed if score = 11 in the following code?
```if score < 5:  
    print("You lose")  
elif score <= 10:  
    print("Not bad!")  
else:  
    print("You win!")  ```

rounds the result to the nearest whole number

discards the remainder and keeps only the whole number part

What comes first in the order of operations?

/ performs real division and returns a decimal, while // performs {{}} division and discards the remainder.

Relational operators

Lesson outcome