The flow of electric current is from left to right.

Electric current is defined as the rate at which electric charge flows.

Ampere is the SI unit for electric current (A)

Hence, Electric current  

I = Q$/$t = charge$/$time

The conventional current flows in the same direction as positive charges, from greater potential (positive) to lower potential (negative) (negative).

Electric current is caused by electrons moving from a lower potential (negative) to a higher potential (positive), hence the direction of electric current is the polar opposite of conventional current.Let's not forget that its more of a convention.