Who gave the experimental value of “G” first

Gravitational force is the force of attraction between any two objects having some mass. It is given by:
$\mathrm{F}=\frac{\mathrm{GMm}}{{\mathrm{r}}^2}$

Where M and m are the masses of the objects, r is the distance between them and G is the universal gravitational constant having the value of 6.67 X 10^-11 Nm²/kg².

The value of G was first given by Henry Cavendish by using a very light spring balance that had two small spheres on both ends. He was the first to find the gravitational force between the masses and the gravitational constant in a laboratory.