find number in string javascript code example

Example 1: js extract only numbers from string

"1.23-45/6$7.8,9".replace(/[^0-9]/g,'')

// Response: "123456789"

Example 2: js get number from string

thenum = "foo3bar5".match(/\d+/)[0] // "3"

Example 3: javascript find a digit in str

var regex = /\d+/g;
var string = "Any string you want!";
var matches = string.match(regex);  // creates array from matches

if (matches){
  // There is a digit in the string.
} else {
  // No Digits found in the string.
}

Example 4: how to find number in string javascript

var str = 10