A conditional expression may be used to qualify the breakpoint; it must be the last option on the command line. When a breakpoint with the If option is set, the executing program will be suspended and the debugger will be activated whenever the breakpoint is encountered. The IF condition is then evaluated. The evaluation always takes place in the environment and language of the program statement. If the IF condition is false, program execution continues and the breakpoint is never reported. If the IF condition is true, the debugger incurs a breakpoint as usual.