sigma ( ∑ {\displaystyle \sum } ) means the sum of all values. ∑ x // sum of all x values ∑ ( 12345 ) = 15 // sum of all values in list (1 2 3 4 5) {\displaystyle {\begin{aligned}&\sum {x}&{\text{// sum of all x values}}\\&\sum {(12345)}=15&{\text{// sum of all values in list (1 2 3 4 5)}}\\\end{aligned}}}
sigma ( ∑ {\displaystyle \sum } ) means the sum of all values.
∑ x // sum of all x values ∑ ( 12345 ) = 15 // sum of all values in list (1 2 3 4 5) {\displaystyle {\begin{aligned}&\sum {x}&{\text{// sum of all x values}}\\&\sum {(12345)}=15&{\text{// sum of all values in list (1 2 3 4 5)}}\\\end{aligned}}}
) means the sum of all values.
