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Hello this is what has occurred to me.



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And in this YouTube video you're going to actually allow the user to see the calculations that occur



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when the user interacts with the app.



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So first of all we need to create an instance variable inside our calculator class Soviero private strange



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and the name is going to be calculations.



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Q relations streak semi-colon.



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Now we are going to go inside this uncreate method and initialize this calculation String instance variable.



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So we are going to see calculations strained assignment operator and here we just assign an empty string



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value to this variable.



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Now that be initialized our instance rowdier Bell calculations streambed you need to inside the switch



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statement here.



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And here we have this billion plus.



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Right.



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So for this case PTEN Plus I'm going to say calculations thrain plus assignment operator plus assignment



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operator two quotes space plus space semicolon.



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OK.



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So it's going to add to the current value of the calculation string to this.



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I created this operator to this text so we could also instead of saying plus are equal we could say



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assignment operator calculation string plus And then this string value.



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It's the same.



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So let's find the subtract operator here.



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So now we can again say calculation is streambed assignment operator calculation strange plus two quotes



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minus semicolon.



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And here we have to find another operator in what application.



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Operator.



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So here we're going to say calculations.



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Strange assignment operator recalculations has three in plus two coats a multiplication of roter semicolon.



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Now we're going to go for this PTEN divide.



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So I can triangulations strange as an assignment operator reachout relations three plus two quotes a



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divide operator two codes and then we're going to put a semicolon at the end of our statement.



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So again after the ending curly brace or a switch statement and a before the end and curly brace of



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Yankel.



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If you're going to say TXI the calculations that said text calculations think semicon.



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So now I need to scroll down here and inside this in say this operator is tapped Meffert.



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Are we going to go after the Indian curly brace of the switch statement and here after this line that



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says t see results that said text string number right left.



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We're going to say calculations textes calculations.



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Strange assignment operator and then you're going to say string number.



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So if you're going to assign the value of these three numbers are left to these two these calculations



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screen valuable so that we can show this value to the user.



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When this operator is actually depressed when a specific operator is pressed we can actually update



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the value of the calculations 3 and variable.



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Now we're going to go inside the number is tappet method here.



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After this line of code we're going to say calculations strange assignment operator currents number



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semicolon anti-X the triangulations that said text calculations string.



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In this way we can actually run the app.



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Let me show you the emulator so we can see for example number 8 and multiplied.



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So you can see this multiplication of Reutter here.



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And for example number six.



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And here it is now number six.



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Right.



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So OK it works fine.



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You can see that it works perfect and it's fine.



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So now in the next tutorial we're going to work on these equal operator and we're going to make it work.



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So thank you very much for watching.



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If you have any questions please post the discussion of the course and then I will do my best to answer



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all of your questions.



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I'll see you in the next two or three odd.