The plus sign "
"
is used to denote a positive number or to indicate addition. It also denotes approach from the right in a
one-sided limit, as in 
.
Plus Sign
See also
Addition, Minus Sign, One-Sided Limit, SignExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Plus Sign." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/PlusSign.html