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JavaScript

Posted by Fumisai Masiyani
Fumisai Masiyani
18,005 Points

How do you write a code for the following question........

Add a conditional statement that tests if the value in the variable a is greater than the value b.If it is, pop up an alert with the message 'a is greater than b'; also add an else clause that pops up the message 'a is not greater than b'.........given the variables .....var a=10;....var b=20;... .var c=30;

1 Answer

LaVaughn Haynes
LaVaughn Haynes
12,397 Points
LaVaughn Haynes
LaVaughn Haynes
12,397 Points

I don't know if this is part of a course or if you are trying this on your own but here is an example of how to write it. If you just want to do a simple conditional you can do so like this:

//define the variables
var a = 10;
var b = 20;

//run the test
if(a > b){
  alert('a is greater than b');
}else{
  alert('a is not greater than b');
}

That works great, but if you put the conditional inside a function you can reuse it by defining a function and then calling it.

//define the variables
var a = 10;
var b = 20;

//put conditional in a function to make it reusable
function compareNumbers(a, b){
  if(a > b){
    alert('a is greater than b');
  }else{
    alert('a is not greater than b');
  }
}

//use the function
compareNumbers(a, b);

Note that the a and b inside the function are different than the a and b outside the function. I will use different letters to make it more clear.

In this function definition we are saying that the numbers that you pass in will be defined as x and y inside the function.

function compareNumbers(x, y){
    //inside this function, although it's not written out:
    //var x = the first value passed in (80);
    //var y = the second value passed in (92);
}

//calling the function with values to be passed in
compareNumbers(80, 92);

This is the function being used multiple times with different values

//define the variables
var a = 10;
var b = 20;
var c = 50;
var d = 30;

//put conditional in a function to make it reusable
//concatenate variable to show the actual number
function compareNumbers(x, y){
  if(x > y){
    alert(x + ' is greater than ' + y);
  }else{
    alert(x + ' is not greater than ' + y);
  }
}

//use the function
compareNumbers(a, b);
compareNumbers(c, d);
compareNumbers(60, 300);

Hopefully that helps you understand how to work out your problem. Good luck!! If you have any specific questions feel free to ask.