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JavaScript JavaScript Foundations Numbers Parsing Numbers From Strings

Posted by Wesen Aredo
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Wesen Aredo
Python Web Development Techdegree Student 3,954 Points

JavaScript Numbers Q no 1 parseInt()

A variable named "boxWidth" already exists with a value of "640px". Create a new variable named "numWidth" and use the "parseInt" method to extract the numeric value from boxWidth's string value.

Jason Anello
Jason Anello
Courses Plus Student 94,610 Points

Hi Wesen,

What code are you trying?

2 Answers

Rich Donnellan
MOD
Rich Donnellan
Treehouse Moderator 27,708 Points
Rich Donnellan
Rich Donnellan
Treehouse Moderator 27,708 Points

Wesen,

Short answer:

var numWidth = parseInt(boxWidth);

Long(er) answer:

Because boxWidth is already defined as has an assigned value, you can access this value by assigning it to the new variable numWidth.

var numWidth = boxWidth;

The parseInt() function (in this case) looks at the value of boxWidth and parses the string "640px" and returns an integer (640).

Final answer:

var numWidth = parseInt(boxWidth);

Check out this resource at Mozilla for a more in-depth explanation of parseInt().

Muhammad Rizwan
Muhammad Rizwan
8,595 Points
Muhammad Rizwan
Muhammad Rizwan
8,595 Points

var numWidth = parseInt(boxWidth, 10);