If Statements

Description:

An if statement is a conditional programming statement that, if proved true, performs a function or displays information. If Statements let us test conditions and perform different operations depending on the result.

There are 4 types of If Statements that we can work with

Single If Statement

Tests for a Single Condition and run or more programming statements based on the results

Basic Structure

If (condition) then
 Statement(s)
End If

Example

If (rain = "true") then
 lstBox.AddRow("Bring an Umbrella")
End If

If/Else Statement

Test for more than one condition and run one or more statements depending on each condition

Basic Structure

If (condition) then
 Statement(s)
Else
 Statement(s)
End If

Example

If (grade >= 65) then
 lstBox.AddRow("Pass")
Else
 lstBox.AddRow("Fail")
End If

If ElseIf Statement

Test for multiple conditions and run or more statements depending on each condition

Basic Structure

If (condition) then
 Statement(s)
ElseIf (condition) then
 Statement(s)
ElseIf (condition) then
 Statement(s)
Else
 Statement(s)
End If

Example

If (temp >= 80) then
 lstBox.AddRow("It's Hot")
ElseIf (temp >= 70) then
 lstBox.AddRow("It's Warm")
ElseIf (temp >= 60) then
 lstBox.AddRow("It's Cool")
Else
 lstBox.AddRow("It's Cold")
End If

Nested If Statement

Test for multiple conditions in a ripple effect way.

Basic Structure

If (condition 1) then 
 If (condition 2) then
 Statement(s) 
 End If
Else
 Statement(s)
End If

Example

If (temp >=60) then 
 If (temp >= 80) then
 lstBox.AddRow("It's Hot")
 ElseIf (temp >= 70) then
 lstBox.AddRow("It's Warm")
 Else
 lstBox.AddRow("It's Cool")
 End If
 Else
 lstBox.AddRow("It's Cold")
End If