javascript char to int code example

Example 1: how to convert char to number in js

// the first parameter is the index of the string to convert to an ascii code
"A".charCodeAt(0);
//output: 65

Example 2: Javascript string to int

var myInt = parseInt("10.256"); //10
var myFloat = parseFloat("10.256"); //10.256

Example 3: character to ascii in js

'a'.charCodeAt(0)//returns 97, where '0' is the index of the string 'a'

Example 4: javascript string to a decimal

<script language="JavaScript" type="text/javascript">
var a = "3.3445";
var c = parseFloat(a);
alert(c);
</script>

Example 5: hex string to int javascript

console.log(hex.toString(16));

Example 6: javascript pareseint

parseInt(string, radix);

console.log(parseInt(' 0xF', 16));
// expected output: 1500

console.log(parseInt('321', 2));
// expected output: 0

console.log(parseInt('321', 10));
// expected output: 321

/* 
 * @param string Required. The value to parse. If this argument is not
 * a string, then it is converted to one using the ToString abstract
 * operation. Leading whitespace in this argument is ignored.
 *
 * radix
 * @param radix Optional. An integer between 2 and 36 that represents
 * the radix (the base in mathematical numeral systems) of the string.
 * Be careful—this does not default to 10!
 * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/parseInt#Description
 * for what happens when radix is not provided
 */