Possible Duplicate:
How to check if a number is float or integer?
I have been using a JavaScript function isNaN(value) for identifying whether a number is an integer or a float. But now I am facing another problem that isNaN() is not filtering float. It is accepting it as integer.
Also it must treat 1.0 as an integer
Can someone guide me to find out a way in which I can filter integer values as well?
In javaScript, there is no difference between decimal and integer, they are both number. One way to diffrentiated is to use regular expression to test the transformed string of the number
var intTest = /^-?(\d+|0)$/;
if(intTest.test(someNumber)) {
console.log('int');
}
// intTest.test(2);
// true
// intTest.test(2.1);
// false
// intTest.test(0);
// true
// intTest.test(-1);
// true
// intTest.test(-1.2);
// false
function is_int(value){
if ((parseFloat(value) == parseInt(value)) && !isNaN(value)) {
return true;
}
else {
return false;
}
}
this too:
function isInt(n) {
return n % 1 == 0;
}
This will work if you want 2.00 to count as an integer.
function is_int(value){
return !isNaN(parseInt(value * 1));
}
Will work if you want strictly of int type.
int type, but there is only number in JS. You know what I mean.
You can use regular expression
if(/^-?\d+\.?\d*$/.test(1.23)) {
// hurray this is a number
}
integer?