Arithmetic Operations

Overview

MQL4 supports standard arithmetic operations for calculations.

Operators

**Additive:** + (addition), - (subtraction)

**Sign Change:** - (unary negation)

**Multiplicative:** * (multiplication), / (division)

**Modulo:** % (remainder of division)

**Increment:** ++ (adds 1 to variable)

**Decrement:** -- (subtracts 1 from variable)

Increment/Decrement Behavior

**Prefix (++i, --k):** Applied to the variable *before* it's used in an expression.

**Postfix (i++, k--):** Applied to the variable *after* it's used in an expression.

**MQL4 Implementation:** The postfix increment/decrement is applied to the variable *after* the entire expression is evaluated.

Constraints

Increment and decrement operations can only be applied to variables, not constants.

Complex expressions involving mixed prefix/postfix operations can lead to compiler-dependent behavior and are not recommended for use.

Related Topics

[Expressions](/basis/operations/operexpression)

[Assignment Operations](/basis/operations/assign)

[Precedence Rules](/basis/operations/rules)