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Almost every game you play is going to have random within that game to make it more interesting because

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of course, if you have the game, it's really predictable.

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It's not going to be that much fun.

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And this is where we introduce random.

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And with JavaScript, we do have the ability to use math random.

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And what that does is that's going to return back a random value anywhere from zero to one within your

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JavaScript.

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So we'll create a brand new variable.

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We can call it computer selection, and we're going to use the built in Amarth random function within

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JavaScript.

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And I'm going to output this value into the console so that we can see that it's always got a random

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value.

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So whenever we click one of these buttons, you can see we've got this random value and this value,

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as mentioned, anywhere from zero to one.

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So we know that 33 percent chance of selecting rock, 33 for paper and 33 for scissors.

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So using this formula, we can determine what the computer is going to select.

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So taking that value of computer selection, we're going to check to see if it's less than zero point

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three four.

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So it's roughly around a third chance of the computer selecting that value.

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And if it does, then we can set up a new variable or we can just use computer selection and equal that

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to rock.

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And it actually doesn't matter which one you use using else.

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If so, another condition we're going to check to see if computer selection is less than or equal to

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zero point six seven.

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So we know that the first one is checking to see if it's less than this third.

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And if it's not, then we're going to check for the next third.

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And we already have pulled out the selections that match less than zero point three four.

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So we've already got that third listed as rock.

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So we only have a third left here.

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And the point, six, seven.

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So using that same formula, we know that if it lands on this, then we can make it another one of the

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options.

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And for this time, let's just do paper.

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And if none of that criteria matches of computer selection, it doesn't match any one of these, then

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we're going to simply select computer selection to scissors.

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And this will give us roughly around a 30 percent chance, a 33 percent chance on any one of these items

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for the computer selection.

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So I'm going to take that computer selection.

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I'll move it down here.

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And we know that the user has the entire text so that one is selected by the user and the computer selection

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is going to be at random.

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So we hit rock.

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Both of them got rock.

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If we had paper, the computer got scissors, we got paper.

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If we picked scissors, then we know that the computer got paper.

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So these are all at random.

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So it doesn't mean that if I hit scissors, it's always going to be paper.

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And that instance that seemed to occur that way.

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But we see sometimes we had scissors and then we get the computer returning back rock.

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So that's how you can introduce a randomness into the selection process, into the gameplay.

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And this is, again, a really crucial part of almost any game that you're going to be developing within

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JavaScript.

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So go ahead and add this in using conditions you can check to see what the value is and then update

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the computer selection value accordingly.

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And then we're going to be ready to move on to the next step where we're going to check to see who wins.

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That's, again, really important part of the gameplay where we need to have some conditions for winning,

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whether it's the player or the computer.

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So that's still to come.