Expressions are evaluated according to operator precedence. Operators of higher precedence—1 being the highest—are evaluated first. Operators of the same level are evaluated from left to right. Precedence may be overridden using parentheses, which can be nested. The inner most parenthesis is evaluated first. Operators, types, and precedence are described in the following table.
| Operator | Type | Precedence | Description |
| * | NUMERIC | 1 | Multiplication |
| / | NUMERIC | 1 | Division |
| Mod | NUMERIC | 1 | Modulo division |
| + | NUMERIC | 2 | Addition |
| - | NUMERIC | 2 | Subtraction |
| & | STRING | 2 | Concatenation |
| < | BOOLEAN | 3 | Less than |
| <= | BOOLEAN | 3 | Less than or equal to |
| > | BOOLEAN | 3 | Greater than |
| >= | BOOLEAN | 3 | Greater than or equal to |
| = | BOOLEAN | 3 | Equal to |
| <> | BOOLEAN | 6 | Not equal to |
| And | BOOLEAN | 4 | Logical AND |
| Or | BOOLEAN | 4 | Logical OR |
| Not | BOOLEAN | 5 | Logical NOT |
Unlike VBScript, all expressions within a Mobile Channels statement are always evaluated. The following code example shows if arr.count is not greater than zero, arr(1) and arr(2) are evaluated and the references to arr(j) result in error.
If arr.count > 0 and arr(1) = "test1" then
arr(2) = "test2"
End If
If arr.count > 0 is FALSE, the ensuing expressions are invalid. The following code example shows the correct implementation of logical operators.
If arr.count > 0 then
If arr(1) = "test3" then
arr(2) = "test4"
End If
End If