A positive number is a real number 
for which 
. Positive numbers on their own are usually written without
an explicit leading plus sign, but a plus is sometimes
prepended (
)
for emphasis or clarity and parallelism in contexts where 
may be either negative or positive.
Positive Number
See also
Negative Number, PositiveExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Positive Number." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/PositiveNumber.html