Definition of Absolute Error:

The Absolute Error is the magnitude of the difference between the observed value and the actual value. It indicates the extent of deviation in the measurement process.

Formula for Absolute Error:

The formula to calculate Absolute Error is:

Absolute\:error=\left|Observed\:Value-True\:Value\right|

Or we can write,

Absolute\:error=\left|x_1-x_2\right|

Where x_1 is the Observed value and x_2 is the True value.

Here, the vertical bars denote the absolute value, ensuring that the error is always a non-negative number.