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JavaScript JavaScript Foundations Numbers Parsing Numbers From Strings

Brian Schmitz
Brian Schmitz
11,167 Points
Posted by Brian Schmitz
Brian Schmitz
11,167 Points

ParseInt Challenge

Can someone please help me parse the boxWidth string per the instructions in the objective. I created the numWidth variable and then tried to pull the numbers fro the boxWidth variable. I don;t recall the video going through how to parse another variable but rather only calling out a variable in the console to parse the number from a string within that variable.

var boxWidth = "640px"; var boxHeight = "480px"; var numWidth = parseInt("640", 10)

Also in the last objective for Math Objectives it asks to create a variable circumference and use the diameter variable and Pi. I have:

var Circumference = diameter * Pi

Do I need the actual Pi symbol? How do I create that on a Dell computer with Windows.

Help is appreciated. Thanks

5 Answers

Sreng Hong
Sreng Hong
15,083 Points
Sreng Hong
Sreng Hong
15,083 Points

Hi Brian <br />

About the parseInt function, i think you do it correct there but to make it through you need to write like this <br /> var numWidth = parseInt(boxWidth, 10);

Michael Hicks
Michael Hicks
23,977 Points

I added quotes around "boxWidth" for some reason, thanks for posting the correct answer!

Shawn Flanigan
PLUS
Shawn Flanigan
Courses Plus Student 15,815 Points
Shawn Flanigan
Shawn Flanigan
Courses Plus Student 15,815 Points

They want you to use the variables...not the values. So, try: var numWidth = parseInt(boxWidth, 10);

For your other question, use Math.PI to get the value of pi. So: var circumference = Math.PI * diameter;

Sreng Hong
Sreng Hong
15,083 Points
Sreng Hong
Sreng Hong
15,083 Points

About the Pi, you need to include the word Math before Pi. It should be like this Math.Pi <br />

Hope this will help, Sreng

Brian Schmitz
Brian Schmitz
11,167 Points
Brian Schmitz
Brian Schmitz
11,167 Points

Thanks Sreng, you are correct. I actually figured out both of my questions in regards to the parseInt and the circumference variable challenge so I good to go. Thanks for your help.