# ADDEXACT

mathThe `ADDEXACT`

function consumes two LONGs from the top of the stack and puts back the sum. If the sum overflows a LONG, this function fails.

Since 2.6.0, this function can be applied to a **LIST** of numerical values and a numerical value. The order of the parameter is very important in that case: considering this function as `F`

, the result of `[ $a $b $c ] F`

is `$a $b F $c F ]`

but the result of `[ $a $b ] $c F`

is `[ $a $c F $b $c F ]`

.

Since 2.7.1, this function can be applied to a **GTS** of numerical values. This is very similar to how this function works on **LIST**s, considering the values of the GTS. In that case, the order of the parameters also matters and the result is either a GTS or a single numerical value.