js number to integer code example

Example 1: javascript convert float to int

function float2int (value) {
    return value | 0;
}

float2int(3.75); //3 - always just truncates decimals

//other options
Math.floor( 3.75 );//3 - goes to floor , note (-3.75 = -4)
Math.ceil( 3.75 ); //4 - goes to ceiling, note (-3.75 = -3)
Math.round( 3.75 );//4

Example 2: Javascript string to int

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

Example 3: converst strig in number in js

const numberInString = "20"; 
console.log(typeof(numberInString)) // typeof is string this is string in double quote " "
const numInNum = parseInt(numberInString) // now numberInStrings variable converted in an Integer due to parseInt
console.log(typeof(numInNum)) // this tell us the type of numInNum which is now a number

Example 4: get the whole value of a number javascript

var value = 2.9802453587962963;
var wholeNum = Math.floor(value);
console.log(wholeNum);  // output ==> 2

Example 5: javascript number length

export function numberLength(number) {
	let length = 0;
	let n = Math.abs(number);
	do {
		n /= 10;
		length++;
	} while (n >= 1);
	return length;
}

export default numberLength;

Example 6: js int

var myInt = 69420

1+1//int
1+"1"//string