Summation( initialization, limitvalue, body );

s = Summation( i = 1, 10, i );

s =	Sets the s variable to the value of the function.
Summation(	Begins the Summation() loop.
i = 1,	Sets i to 1.
10,	Sets the limit of i to 10.
i	All values of i from 1 to 10 are added together, resulting in 55.
);	Ends the loop.

Summation( i = 1, N Row(), x ^ 2 );