Sum Command

Sum[List]

Calculates the sum of all list elements.

Note: This command works for numbers, points, vectors, text, and functions.

Example:  

• Sum[{1, 2, 3}] gives you the number a = 6.
• Sum[{x^2, x^3}] gives you f(x) = x² + x³.
• Sum[Sequence[i,i,1,100]] gives you the number a = 5050.
• Sum[{(1, 2), (2, 3)}] gives you the point A = (3, 5).
• Sum[{(1, 2), 3}] gives you the point B = (4, 2).
• Sum[{"a","b","c"}] gives you the text "abc".

Sum[List, Number n of Elements]

Calculates the sum of the first n list elements.

Note: This command works for numbers, points, vectors, text, and functions.

Example: Sum[{1, 2, 3, 4, 5, 6}, 4] gives you the number a = 10.

CAS specific syntax

Following syntax works only in CAS view

Sum[<Expression>,<Variable>,<Start Value>,<End Value>]