whole_square.js

function solution(A, B) {
    if (A == B){
        // Same values
        return 0;
    } else if(A > 0 && B > 0){
        // Positive values
        var left = Math.sqrt(A);
        var right = Math.sqrt(B);
    
        return (Math.floor(right) - Math.floor(left)) + 1;  
    } else if(A < 0) {
        // A is less than 0.
        var left = Math.sqrt(-1 * A);
        var right = Math.sqrt(B);
    
        return (Math.floor(right) + Math.floor(left)) + 1;  
    } else {
        // Both are less than 0 (A<=B).
        var left = Math.sqrt(-1 * A);
        var right = Math.sqrt(-1 * B);
    
        return (Math.floor(right) - Math.floor(left)) + 1; 
    }
}