javascript check if string is number
if (typeof myVar === 'string'){
//I am indeed a string
}javascript check if string is number
if (typeof myVar === 'string'){
//I am indeed a string
}js check if string is number
isNaN(num) // returns true if the variable does NOT contain a valid number
isNaN(123) // false
isNaN('123') // false
isNaN('1e10000') // false (This translates to Infinity, which is a number)
isNaN('foo') // true
isNaN('10px') // truejs string have number js
var hasNumber = /\d/;
hasNumber.test("ABC33SDF"); //true
hasNumber.test("ABCSDF"); //falsejavascript check if string is number
function isNumeric(num){
return !isNaN(num)
}
isNumeric("23.33"); //true, checking if string is a number.js check if string is integer
function isInt(str) {
return !isNaN(str) && Number.isInteger(parseFloat(str));
}Copyright © 2021 Codeinu
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