How to Determine if a Number is a Prime Number by Writing a Computer Program , C++ , Part 2

This tutorial is part 2 of a playlist showing how to determine if a number is prime or not by writing a C++ program.
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[@devonlong7590]

Hey Paul,
thanks for the explanation! Quick question, why use sqrt(number) as the loop's test expression?

[@bitsnnbytes]

yes it should be the original number

[@chaouchsamir3635]

yup you are right, it is weird to use the sqrt, and i think it is better to use (number/2)

[@markpeynado9013]

Perhaps a silly question Windows 10 is asking what program to use to execute this program. Is there another application that I need to install?

[@beachboybali7925]

can you please give me the code