"abs" function:

• Can also be called as nas_abs

If the argument is number as string, return it's absolute value as string.

Examples:

• running: ("abs" "100") will give: "100"

• running: ("abs" "-100") will give: "100"

• running: ("abs" "100e500") will give: "1e+502"

• running: ("abs" 0) will return nothing

• running: ("abs" "test") will return nothing