WEBVTT

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Welcome in this lecture, I'm going to talk about a challenge for you.

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It's about creating a simple user and password protected program, using the power of if statements.

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Of course, this program will not be a military level secure program.

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It's a simple program just for demonstrating the usage of these statements.

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OK, let me show you how it's going to work.

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First of all, the user will pass username and password into the program and the program will look into

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ways that are strings.

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Then it will use an if statement to check whether the user has provided the username and password or

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not.

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If not so, then the program will display the usage information and will create.

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Then it will check the provided username with the correct username, if they don't match, it will display

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an error message and you do it again.

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If all is OK, then it will check the provided password with the correct password again.

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If they don't match, it will display another error message and will quit.

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And lastly, and the username and the password, correct, then it will print and access granted the

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message.

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For now, there should be only one user who can access to this program.

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OK, it isn't going to support multiple users yet.

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All right.

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That's all.

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OK, let me show you how it works in the coding, Ed..

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I'm going to show its output to you right now.

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OK, so you can better understand how it works so you can program it however you want.

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OK, when I run it without any arguments, it should display an error message like this one.

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Usage, username, password, it asks for username and password.

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That's because I didn't give it a username and password.

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OK, let's say that we have a user named Jack and his password is eighteen eighty eight.

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OK, so when I run it with an incorrect user like this now it should print and access denied error messages

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like this are.

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Or when I run it with a crack user, but with an incorrect password like this.

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Then it should print this invalid password for Jack.

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Now, let's run it with the correct username and password.

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OK, as you can see now, it's Grant's access to the jack.

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All right, that's all this is your challenge.

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In the next lecture, I'm going to show you how to build this program.

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But before that, please try to do this on your.

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All right, good luck, see you.