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Let's talk about assignment operators in JavaScript, which includes the following.

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So back to Visual Studio code.

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The first one is what we call the assignment operator, and I'm going to paste the description with

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some case study.

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So over here I'm going to add a comment and that is the assignment operators.

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And the first one is to use the equal to sign.

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And it says that this is used to assign value to a variable.

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And this is what we have used from the beginning of this course till this point.

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Anytime we want to assign a value to a variable, we use the assignment operator.

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And this is the most common use operators in JavaScript.

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So let's look at the case study.

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Let's say that you purchased ten apples from the grocery store.

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How can you use JavaScript to track of how many apples that you have?

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So here is going to be as simple as ABC by declaring a variable called total apples.

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And is equal to ten.

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As you can see here, that we have the underline.

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And one thing that I did not tell you is that in JavaScript, you cannot really declare a variable that

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has been declared already.

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If you scroll up here, we have the same variable name being declared.

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So we cannot reassign, so we can change this one to my total apples or something different.

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So let me change this one to my total apples and I will use camel casing here.

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And if you console log, my total apples is going to be ten.

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Then the next operator is to use the plus equal sign.

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So I'm going to copy this.

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Assignment operator using plus and then the equal sign.

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And we have used this one under the arithmetic operators.

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So let's see how we are going to use.

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First step is let me provide the description so that you can follow along pretty easily.

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This is used to add value on the right to the variable on the left and then assign the result to the

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variable on the left.

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Let's have some case study here so that you better understand.

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And this is the case study.

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As the mayor of a small town, the current population of your town is 100.

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But during this year, an additional 50 people moved to your town.

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How would you calculate the total population now?

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And here we go.

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Let's look at the variable names here.

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So here we have population.

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So we can say that let the population equal to 100.

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And this year it has increased by 50.

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So now we can redeclare this variable as plus equal to 50.

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And if we console log the population, let's have a look.

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And we have 150.

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But if you use const one more time, you're going to have error because we cannot re update a variable

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declared using const.

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And the next type of the arithmetic operator is using the minus.

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And let me copy this.

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And down here, paste it and change this one to minus.

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And I'm going to be the opposite way.

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So let's look at the case study so that you better understand.

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You have $200 in your wallet, and after buying a book for $30, how can you calculate how much money

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you now have in your wallet?

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So you can pause this video and give it a shot.

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Otherwise, let's continue.

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So based on this, we can deduce the variables names here as money in wallet and is equal to 200.

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And if I have used $30, how am I going to calculate?

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And for this we have a couple of ways we can use something like this as let.

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Money in wallet.

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Let me say money in wallet left is equal to 200 -30.

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And if I console log.

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Money in wallet and that is the money in wallet left.

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We have 117 but if you use the minus and equal sign is going to be as this money in wallet minus equal

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to 30.

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And it is same as before.

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So if you console.log money in wallet, we have won 70.

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Cool.

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Right?

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And the next type is the using multiplication sign and then the equal sign and you're going to be the

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same format.

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So let's look at the case study here.

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And it goes like this.

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You have 12 cookies and you decided to break each one into three pieces to share with your friends.

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How would you calculate the total number of cookie pieces that you have now?

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And it's going to be using the multiplication and then the equal sign.

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And for this I'm going to declare a variable called cookies in Java.

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So here cookies in Java is equal to 12.

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And I will say cookies in Java is I'm going to update that one using multiplication sign equal to and

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multiply by three.

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So with this one, if I save it and check cookies in Java.

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Is it?

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Cookies?

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Enjoy.

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And we have 36.

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Great.

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Or I can multiply this one by three.

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And I can remove this.

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The result is the same, but this is the shortest syntax.

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All right, cool.

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So let me undo and bring back to the.

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This one.

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All right.

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And next one is the division assignment.

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And you're going to be assessed.

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The difference here is we use different symbols before the equal sign.

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So for this, let's provide this scenario.

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It says that you have 200 page book that you want to study over the next five days, planning to read

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the same number of pages each day.

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How would you calculate how many pages you need to read each day?

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And we're going to be division, right?

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So here is going to be total pages.

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And remember, we have this variable name up here as total pages.

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So now we can change the name here as my total pages.

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And is equal to 200 and total pages.

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That is my total pages.

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I have to change this one to use let because we are updating a divided and equal to five.

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And if I console log my total pages, we have 40.

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Then we have the remainder or the module operator for this one too.

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We have explained it.

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So let's provide the case study and let's have a look.

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It says that you have 25 concert tickets that you want to distribute equally among four friends.

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How would you calculate the number of leftover ticket when you hear leftover meaning the remainder?

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Therefore, we are going to use the module operator and it goes like this let ticket and we have that

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one already and is equal to 25.

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I think we don't have ticket here being declared so we can go ahead and use this.

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And next is we are going to use or update the ticket module then divided by four.

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And if you console log ticket, we have one remainder of one.

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The last one is the exponential for this.

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One example is two exponent three meaning to multiply itself three times.

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And let me provide the case study here as that in a math problem you are giving a base number of two

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and ask to raise this number to the power of four.

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How will you calculate this?

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Meaning that we are going to multiply two four times, meaning two exponent four.

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So we are going to use JavaScript to achieve this and it's going to be as let the base number equal

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to two.

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And we are going to use the exponent symbol and we're going to be as base and multiply two times is

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equal to four.

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And for this one, we're going to have 16.

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So this one means that to multiply by two, multiply by two, multiply by two, that is four times.

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Great.

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So now if I save this and check inside here, that is base.

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We have 16.

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Great.

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So guys, these are examples of the assignment operators.