The GDP can rise from one year to the next for two different reasons: first of all, it can rise due to increases in the overall prices of goods and services in the economy for the measurement period. Secondly, it can grow due to increases in the quantity of goods and services produced in the economy for the time period. For the economists, the separation of these two effects is important since the economic theory is interested in measuring the changes coming from the increases in the quantity at output produced. Especially, economists want to measure the change of the total quantity of goods and services the economy is producing from a year to another excluding the overall price changes in the economy. In order to do this exclusion of price changes, the economists use a measure called the real GDP. The real GDP is the total production of goods and services valued at constant prices. If the total production of goods and services is valued at constant prices, then the real GDP shows how the economy’s total production of goods and services changes over time. Hence, we can define the economic growth in real terms. The real economic growth, then, is the percentage change in real GDP from a period to another.