∑
Symbol  Format  Data 

∑  Code Point 
U+2211 
TeX 
\sum 

SVG 
In math, the summation symbol (∑) is used to denote the summation operation. Typically, the symbol appears in an expression like this:
In plain language, this expression means sum together the expressions represented by starting from and ending when . Read more…
The capital Greek letter Σ (Sigma) is visually very similar to the summation symbol (∑) which is the dedicated symbol in math for the summation operation.
The summation operator is represented by the summation symbol ∑ and represents the operation of summing a sequence of expressions together.