Handling conditions#

Your code needs the ability to take different actions based on different conditions#

Operator

Description

=

equal to

<>

not equal to

<

less than

<=

less than or equal to

>

greater than

>=

greater than or equal to

 
Price <- 1.2
IF Price >= 1.00
  THEN
    Tax <- 0.07
    OUTPUT Tax
ENDIF

You can add another action using ELSE when conditions not met#

Price <- 0.9
IF Price >= 1.00
  THEN
    Tax <- 0.07
    OUTPUT Tax
  ELSE
    Tax <- 0.0
    OUTPUT Tax
ENDIF

Be careful when comparing strings#

Caution

String comparisons are case sensitive

Country <- "CANADA"
IF Country = "canada"
  THEN
    OUTPUT "Oh look a Canadian"
  ELSE
    OUTPUT "You are not from Canada"
ENDIF

Use string functions to make case insensitive comparisons#

Country <- "CANADA"
IF LCASE(Country) = "canada"
  THEN
    OUTPUT "Oh look a Canadian"
  ELSE
    OUTPUT "You are not from Canada"
ENDIF

Conditions allow our code to react to different situations#

  • Apply appropriate state or federal taxes based on location

  • Calculate salary based on job level

  • What to do if a file is not found

  • What to do if an expected value is missing

Exercises#

Exercise

Write a Boolean expression equivalent to the statement:

10 times 7 is equal to 70

And then display the result.

// Click 'edit' button to input your code.

Exercise

What is printed when the following statements are executed?

A <- 24 / 8
B <- 24 + 8
OUTPUT A == B

Exercise

Write a program tot input the length and width of a maze. If the two sides are equal, print “The maze is square”. If the two sides are not equal, print “The maze is rectangular”.

Include at least two comments in your program.

// Click 'edit' button to input your code.