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# Numeric expressions

Numeric expressions consist of combinations of numeric constants, numeric variables, ordinary numeric literals, binary operators, and parentheses.

Numeric expressions can contain register-relative or program-relative expressions if the overall expression evaluates to a value that does not include a register or the PC.

Numeric expressions evaluate to 32-bit integers in A32 and T32 code. You can interpret them as unsigned numbers in the range 0 to 232-1, or signed numbers in the range -231 to 231-1. However, `armasm` makes no distinction between -`n` and 232-`n`.

In A64 code, numeric expressions evaluate to 64-bit integers. You can interpret them as unsigned numbers in the range 0 to 264-1, or signed numbers in the range -263 to 263-1. However, `armasm` makes no distinction between -`n` and 264-`n`.

Relational operators such as >= use the unsigned interpretation. This means that 0 > -1 is `{FALSE}`.

## Example

```a   SETA    256*256           ; 256*256 is a numeric expression
MOV     r1,#(a*22)        ; (a*22) is a numeric expression
```