Data type Review PARSEING&PARSEFLOAT--JS study notes 2015-6-2 (46th day)

Success lies in persistence, giving yourself this sentence;

Today, we review the numerical conversion methods of the two data types: parseint and parsefloat.

Compared to number () method, the two methods of parse are relatively diligent, from left to right, and number is a comprehensive analysis;

Can understand so parseint, he compared local tyrants, in the conversion value, from left to right, encountered non-digital time to stop the conversion, the back of the data are all thrown away;

But parseint is still relatively clever, when the value is preceded by a space, one or more 0 of the time, or will be successfully converted to an integer value, var num1 = parseint (' 0000200 ')//200

And parsefloat, the comparison "thrifty" encountered the decimal point (the first decimal point) or can continue to parse the future

Using both of these methods, we can determine whether a numeric value is not an integer:

var num = 109.88;

if (parseint (num) = = parsefloat (num)) {

Alert (num+ ' is an integer ');

}else{

Alert (num+ ' is decimal ')

}

Data type Review PARSEING&PARSEFLOAT--JS study notes 2015-6-2 (46th day)