What is the use of breakpoint?

breakpoint 1.2. A Flutter plugin to calculate the material design breakpoints . Example.

Setting breakpoints To set a breakpoint, click the left margin (the line number ruler) in the source area . Clicking once sets a breakpoint, which should also show up in the Breakpoints area on the left. Clicking again removes the breakpoint.

Breakpoints are most commonly used to interrupt a running program immediately before the execution of a programmer-specified instruction . This is often referred to as an instruction breakpoint.