VBA Logical Operators: AND, OR, NOT

Details: Last Updated: 13 May 2019

Logical Operators

Let's say you want to process a customer order. For that, you want to first check to see if the ordered product exists or not. If it does, you also want to check if the quantity on hand is enough. Logical operators come in handy in such cases. Logical operators are used to evaluate more than one condition.

S/N	Operator	Description	Example	Output
1	AND	AND: This is used to combine more than one condition. If all the conditions are true, AND evaluates to true. If any of the condition is false, AND evaluates to false	If true = true AND false = true THEN	false
2	OR	OR: This is used to combine more than one condition. If any of the conditions evaluate to true, OR returns true. If all of them are false, OR returns false	If true = true OR true = false THEN	true
3	NOT	NOT: This one works like an inverse function. If the condition is true, it returns false, and if a condition is false, it returns true.	If NOT (true) Then	false

Example Source Code

For the sake of simplicity, we will be comparing hard coded numbers.

Add ActiveX buttons to the sheet from the "Insert option."

Set the properties as shown in the image below

The following table shows the properties that you need to change and the values that you need to update too.

S/N	Control	Property	Value
1	CommandButton1	Name	btnAND
		Caption	AND Operator (0 = 0)
2	CommandButton2	Name	btnOR
		Caption	OR Operator (1 = 1) Or (5 = 0)
3	CommandButton3	Name	btnNOT
		Caption	NOT Operator Not (0 = )

Add the following code to btnAND_Click

Private Sub btnAND_Click()
    If (1 = 1) And (0 = 0) Then
            MsgBox "AND evaluated to TRUE", vbOKOnly, "AND operator"
        Else
            MsgBox "AND evaluated to FALSE", vbOKOnly, "AND operator"
    End If
End Sub

HERE,

"If (1 = 1) And (0 = 0) Then" the if statement uses the AND logical operator to combine two conditions (1 = 1) And (0 = 0). If both conditions are true, the code above 'Else' keyword is executed. If both conditions are not true, the code below 'Else' keyword is executed.

Add the following code to btnOR_Click

Private Sub btnOR_Click()
    If (1 = 1) Or (5 = 0) Then
            MsgBox "OR evaluated to TRUE", vbOKOnly, "OR operator"
        Else
            MsgBox "OR evaluated to FALSE", vbOKOnly, "OR operator"
    End If
End Sub

HERE,

"If (1 = 1) Or (5 = 0) Then" the if statement uses the OR logical operator to combine two conditions (1 = 1) And (5 = 0). If any of the conditions is true, the code above Else keyword is executed. If both conditions are false, the code below Else keyword is executed.

Add the following code to btnNOT_Click

Private Sub btnNOT_Click()
    If Not (0 = 0) Then
            MsgBox "NOT evaluated to TRUE", vbOKOnly, "NOT operator"
        Else
            MsgBox "NOT evaluated to FALSE", vbOKOnly, "NOT operator"
    End If
End Sub

HERE,

"If Not (0 = 0) Then" the if statement uses the NOT logical operator to negate the result of the condition. If the conditions is true, the code below 'Else' keyword is executed. If the condition is true, the code above Else keyword is executed.

Download Excel containing above code