# NAMING variables/passion to theoretical manipulation containers

#### Ryan\$

##### Full Member
Hi guys !
I'm so confused about something maybe others think it as simple as it but I find it hard to manipulate and treat with ..along my analysis.

lets assume I want to calculate the sum of integers then, I can define variable like this X is sum of integers, and there's another cosmetics naming which I can define it as sum(integers).
what's confusing me is " sum(integers) " is at the end variable like X but the "()" is annoying me and what's the behind concept of using () in the naming containers?! is using () while naming variables affecting my solution analysis?

#### JeffM

##### Elite Member
If I understand your incoherent question, you are asking why we use indices when naming variables.

For example, why use

$$\displaystyle x_1, \ x_2, \text { and } x_3 \text { instead of } x, \ y, \text { and } z.$$

• topsquark

#### HallsofIvy

##### Elite Member
Writing a sum as "X" is mathematics. Writing it as "su
Hi guys !
I'm so confused about something maybe others think it as simple as it but I find it hard to manipulate and treat with ..along my analysis.

lets assume I want to calculate the sum of integers then, I can define variable like this X is sum of integers, and there's another cosmetics naming which I can define it as sum(integers).
what's confusing me is " sum(integers) " is at the end variable like X but the "()" is annoying me and what's the behind concept of using () in the naming containers?! is using () while naming variables affecting my solution analysis?
Writing "X" is mathematics. Writing "sum(integers)" appears to be computer code of some kind. One has nothing to do with the other.

• topsquark