Yes, You can use Add function quickly with using calculator or computer. For example you want to add 1 to 100 or 1 to 200 etc. There is no need to add like this 1+2+3+4+5+6+7+ .... ????. There is shortest way to calculate this type of calculations. Formula is as under :-
N x (N+1)
---------
2
Example :- Add 1 to 300 = ??
N will be 300 in above example.
Result = 300 x (300+1) 300 x 301
-------------- = ------------ = 150 x 301 = 45150
2 2
Second Example : - Add 1 to 10 = ??
N = 10
(10 x 11)/2 = 55
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