Calculate the sum of the first n natural numbers using the formula S = n(n+1)/2. A fast way to add 1 + 2 + 3 + ... + n.
Calculate the sum of the first n natural numbers using the formula S = n(n+1)/2. A fast way to add 1 + 2 + 3 + ... + n.
The last natural number in the sum.
The sum of the first n natural numbers equals n times (n plus 1) divided by 2.
How this calculator works
The sum of the first n natural numbers equals n times (n plus 1) divided by 2.
Common questions about this calculator
