Specifies the command(s) to perform if an expression evaluates to TRUE.

Remarks

An if-statement that contains an expression is differentiated from a non-expression IF such as If FoundColor <> Blue by making the character after the word "if" an open-parenthesis. Although this is usually accomplished by enclosing the entire expression in parentheses, it can also be done with something like if (x > 0) and (y > 0). In addition, the open-parenthesis may be omitted entirely if the first item after the word "if" is a function call or an operator such as "not" or "!".

When an IF or an ELSE owns more than one line, those lines must be enclosed in braces. However, if only one line belongs to an IF or ELSE, the braces are optional. See the examples below.

On a related note, the command "if var [not] between LowerBound and UpperBound" checks whether a variable is between two values, and "if var [not] in value1,value2" can be used to check whether a variable's contents exist within a list of values.

Related

Expressions, Assign expression (:=), if var in/contains MatchList, if var between, IfInString, Blocks, Else

Example

if (A_Index > 100 or Done)
	return

if (A_TickCount - StartTime > 2*MaxTime + 100)
{
	MsgBox Too much time has passed.
	ExitApp
}

if (Color = "Blue" or Color = "White")
{
	MsgBox The color is one of the allowed values.
	ExitApp
}
else if (Color = "Silver")
{
	MsgBox Silver is not an allowed color.
	return
}
else
{
	MsgBox This color is not recognized.
	ExitApp
}