Standard: pauses the execution of the program at a specific line in a file by pressing the F12 key.
Conditional: causes MATLAB to pause at a specific line in a file only when a specified condition is met. For example, you can use conditional breakpoints when you want to examine results after some iterations in a loop.
Error: Unlike standard and conditional breakpoints, you do not set error breakpoints at a specific line or in a specific file. When you set an error breakpoint, MATLAB pauses at any line in any file if the error condition specified occurs. MATLAB then enters debug mode and opens the file containing the error, with the execution arrow at the line containing the error.