js check if int code example
Example 1: javascript check if number
if (Number.isInteger(val)) {
}
if (isNaN(val)) {
}
if (typeof(val) === 'number') {
}
Example 2: javascript check if number
if (Number.isInteger(val)) {
}
if (isNaN(val)) {
}
if (typeof(val) === 'number') {
}
Example 3: javascript is number an integer
Number.isInteger(value)
Example 4: javascript check if a value is an int
Number.isInteger(2);
Number.isInteger(90);
Number.isInteger("37");
Number.isInteger(false);
Example 5: javascript check if number
function isNumber(n) { return /^-?[\d.]+(?:e-?\d+)?$/.test(n); }
------------------------
isNumber('123');
isNumber('123abc');
isNumber(5);
isNumber('q345');
isNumber(null);
isNumber(undefined);
isNumber(false);
isNumber(' ');
Example 6: javascript check if a value is a integer number
Number.isInteger(123)
Number.isInteger(-123)
Number.isInteger(5-2)
Number.isInteger(0)
Number.isInteger(0.5)
Number.isInteger('123')
Number.isInteger(false)
Number.isInteger(Infinity)
Number.isInteger(-Infinity)
Number.isInteger(0 / 0)