of courseyou don' know yet whether the commenting has worked save the file to disk and then choose runrun module you see new python shell window open with just single line of outputas shown in figure - sothe first print(commandwhich isn' commented outexecutes just finebut the second one doesn' figure - commented out lines of code don' execute to add the code back into the applicationplace the insertion point at the beginning of the lineor highlight the entire lineand choose formatuncomment region idle removes the comment that it added earlier save the file and then choose runrun module to see the result this timeyou see both print(commands executeas shown in figure - figure - both print(commands execute when nei ther is com mented out you can comment out multiple lines of code at once by highlighting all of the lines and choosing formatcomment out region likewiseyou can uncomment out multiple lines of code by highlighting all the lines and choosing formatuncomment region it isn' necessary to comment out or uncomment out one line at time unless you have just one line of code to check