Simple Math Util Functions to Solve Floating Point Problems

floatingmath.js

const toInt = (n) => {
    // If n is not a number return n
    if ( typeof n != 'number') return n;
    let s = n.toString();
    
    // If n is a whole number return n
    if (s.indexOf('.') == -1) return n;
    
    // If n is a floating number return the int representation
    let len = s.split('.')[1].length;
    for (let i = 1; i <=len; i++) {
        n = n * 10;
    }
    return n;
}

const toFloat = (n, d) => {
    // If n is not a number return n
    if ( typeof n != 'number' || typeof d != 'number') return n;
    let s = n.toString();
    
    for (let i = 1; i <= d; i++) {
        n = n / 10;
    }
    
    return n;
}

/* ====== Usage =======
TO Solve the Problem of 
0.1 + 0.2 = 0.3000000000004

let x = 0.1
let y = 0.2
let z = toFloat(toInt(x) + toInt(y), 1);

z = 0.3;
*/