Gini coefficient is an indicator of income or wealth inequality and is derived from the Lorenz curve.
It is measured by dividing area between perfect equality curve and actual income distribution curve by area under perfect equality curve.
The coefficient ranges from 0 (0%) to 1 (100%), with 0 representing perfect equality (where every resident in a country has the same income) and 1 representing perfect inequality (one resident earned all income and the rest earned nothing).
