parseInt() parses number literals with exponent incorrectly

Question

I have just observed that the parseInt function doesn\'t take care about the decimals in case of integers (numbers containing the e character).

Answer 1

It tries to parse strings to integers. My suspicion is that your floats are first getting casted to strings. Then rather than parsing the whole value then rounding, it uses a character by character parsing function and will stop when it gets to the first decimal point ignoring any decimal places or exponents.

Some examples here http://www.w3schools.com/jsref/jsref_parseint.asp