Source Lines Of Code (SLOC) is a software metric used to measure the size of a software program by counting the number of lines in the text of the program’s source code. SLOC is typically used to predict the amount of effort that will be required to develop a program, as well as to estimate programming productivity or maintainability once the software is produced. There are some drawbacks in SLOC metrics that affect the quality of software because of SLOC metric output is used as an input in other software estimation methods Like COCOMO Model.