Question

What is electric current and what its formula and unit ?

Answer 1

It is the ordered flow of charges . It is S.l unit is ampere (A)

Answer 2

current is flow of electrons. there are two types of charge positive and negative charge. it is defined as amount of charge flowing per unit time.
its SI unit is ampere which is devoted by capital A.it's a scalar quantity .
the conventional direction of current is opposite to the flow of electrons
$i = \frac{q}{t}$
where I is current , Q is charge, n. t is time in seconds