zero, because for every positive number, there exists a negative.
A sum consists of two or more numbers - a single number cannot have a sum.
1+3+5+7+9=25
A sum is an operation involving two or more numbers. You cannot have a sum of a single number.
A sum is used to compare two or more numbers - a single number cannot have a sum.
A sum is made with a combination of several numbers - a single number cannot make a sum.
A single number cannot create a sum - a sum is used to total two or more numbers.
none
The sum of all the numbers from 101 through 200 is 15,050.
The answer is zero !
The sum of all odd numbers 1 to 120,000 is 14,400,000,000.
The sum is infinite
"Sum" means the additive combination of two or more numbers. There's no such thing as the sum of one single number.