DDA (Digital Differential Analyzer) is a line drawing algorithm used in computer graphics to generate a line segment between two specified endpoints. It is a simple and efficient algorithm that works by using the incremental difference between the x and y coordinates of the two endpoints to plot the line.

It avoids using multiple operations which have high time complexities.

Due to the limited precision in the floating point representation, it produces a cumulative error.

Bresenham's line drawing algorithm is a second method of generating a line that was proposed after the DDA algorithm to overcome its limitations and drawbacks. It was developed by J.E. Bresenham in 1962.

It is faster than the DDA algorithm as it does not involves the use of heavy operations such as multiplication and division.

It involves only integer arithmetic. Hence, it is easier to implement.