Question

Could someone provide me general java script statements that would answer these questions?
These can be very general, I just need to know what statements to use to perform these functions so I can develop an outline.

How to implement concatenated if/else statements.

How to implement while loops, do while loops, and for loops.

Be able to perform error checking using while loops.

Define and implement classes: properties, accessors, mutators, constructors (defaults and with arguments), methods, toString method

Create objects of the previous implemented class, and use the accessors, mutators, and methods.

Thank you!

Answer 1

1)If/else statements in javascript:

if(condition){

do something;

}

else{

do this;

}

2)loops in js:

for loop:

for(var i=0;i<10;i++){

do something;

}

do while loop:

var i = 0;
do {
i++;
}
while (i < 5);

while loop:

while(condition){

do something;

}

while loop for error checking/validations:

var color is userinput;
to check if user entered input is correct or not 
while (color) {
      if(color=="red"){
            break;
             }
       else {
        input=user entered color;
        }
    }

the while loop will ask user to reenter the color till it is red.

3)javascript has no classes but uses prototype based inheritance scheme.

function Person(name, gender){

// Add object properties like this
this.name = name;
this.gender = gender;
}

// Add methods like this. All Person objects will be able to invoke this
Person.prototype.toString = function(){//tostring
return this.name+" "+this.gender;
};
Person.prototype.getName = function(){
return this.name;
};
Person.prototype.getGender = function(){//accessor
return this.gender;
};
Person.prototype.setGender = function(gender){//mutator
this.gender=gender;
};
// Instantiate new objects with 'new'
var person = new Person("Bob", "M");
console.log(person.getName());
person.setGender("F");
console.log(person.toString());

Expected output: