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JavaScript JavaScript Basics (Retired) Working With Numbers Review Numbers and the Math Object

Laura Henneberry
Laura Henneberry
1,808 Points
Posted by Laura Henneberry
Laura Henneberry
1,808 Points

Wouldn't the answer be Syntax Error, because .5 is not a whole number?

for console.log( parseInt( '.5 FTE' ));

2 Answers

Jason Anello
PLUS
Jason Anello
Courses Plus Student 94,610 Points
Jason Anello
Jason Anello
Courses Plus Student 94,610 Points

Hi Laura,

parseInt will attempt to convert the string into an integer. If the first character can't be converted into a digit then it will return NaN - Not a Number

Since the period can't be converted to a digit it returns NaN.

If the string was '1.5 FTE' instead then it would return the number 1. The character 1 can be converted to a digit but the period can not so it stops right there.

Here's the mdn page on it if you'd like to read more: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/parseInt

Jacob Mishkin
Jacob Mishkin
23,118 Points
Jacob Mishkin
Jacob Mishkin
23,118 Points

instead of using the parseInt() function, you might want to try using parseFloat(), .5 is a floating number and not an integer.

here is more on parseFloat()