javascript check if number
function isNumber(n) { return /^-?[\d.]+(?:e-?\d+)?$/.test(n); }
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isNumber('123'); // true
isNumber('123abc'); // false
isNumber(5); // true
isNumber('q345'); // false
isNumber(null); // false
isNumber(undefined); // false
isNumber(false); // false
isNumber(' '); // falsehow to know if a number has a decimal number js
function hasDecimal (num) {
return !!(num % 1);
}
hasDecimal(2) // true
hasDecimal(2.345) // falseCopyright © 2021 Codeinu
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