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I hope you enjoyed this assignment and the questions that it involved.

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Each question was progressively getting more challenging than the previous one.

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So in this video, I'm going to go over the solution to each question.

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If you have any questions about my solution, please ask them in the Q&A section.

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So question one States create three variables with the names Val.

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One, Val to an answer.

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So let's go ahead and do that.

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Okay.

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So now we have our three variables.

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We want to perform a simple operation of generating the modulo four value one and value two.

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And we state that we need to assign the answer to the ants variable so we know value one is going to

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be value five and value two is two.

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And then we say, let ants hold the answer to the modulo of vowel one to vowel two.

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So I believe the answer to this is going to be one.

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So let's print this out and verify that that is correct.

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And we want to print out ants.

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So now we do cargo run and we see the answer is one.

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So we have question one complete.

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Question two is create a vector and put the values two, four, six, eight and ten inside the vector.

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So for us to do this, we can say let vec equals and then we can use the vector macro since we know

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what values we want to put in and we will put in two, four, six, eight and ten.

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So a very super easy way for us to create a vector.

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And then once we have created our vector, we want to print out the current values.

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So to print them out, we will use the print line macro,

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and now we will print out the vector.

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So let's make sure our vector printed out and we see we have two, four, six, eight and ten.

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Now we want to remove the value ten, add the value 12, and then print the vector back out to confirm

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our results.

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So to print it back out, we will copy and paste.

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And now we want to remove the value ten.

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Well, we see ten is the last value added in.

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So we can very easily remove this value by executing the pop method on it.

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And now we can add the value 12 by using the push method.

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And if we run, this cannot borrow as mutable.

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So what we need to do in order to mutate is we a.k.a change the values inside of the vector variable.

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We need to add the mutt key word to it.

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So now if we run it, we see that we have two, four, six, eight and 12, which is the desired output.

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So again, any time you want to mutate a variable or change it, you have to have the mute or mutt keyword

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added to it.

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For question three, we want to create a function called concatenate string.

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So can cat string.

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And then inside excuse me.

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And our main function, we want to create a string variable.

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So we will say let stir one equals a string from and we want the value.

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Hello.

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The function is going to take one argument that is of type string.

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So in here we'll have our vowel that is a string and we are going to return a string.

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So now we are returning a string and then inside the function we want to contact the string world to.

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Hello.

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So what we want to do.

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It's a vow.

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Plus.

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World.

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And now if we come back to Maine and we say, let ants equal.

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You can catch a string of stir one.

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And now if we print out ants again, we see that we successfully concatenated with hello world.

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And in case you might be wondering how come we were able to use ants down here and up here because we

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re initialized ants here.

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So the value up here is no longer valid.

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Ants will now only be referred to by our value down here.

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So now we have successfully created a string function that will concatenate strings together.

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And then our last question is create a function called control flow.

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So we have control flow.

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So we created our function.

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And this is going to take one argument that is an integer.

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So we will say VAO and we'll just give it IE 32 and then based on this integer, print out the following

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the value is one.

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The value is greater than 50, the value is less than 25 or the value is greater than 25, but less

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than 50.

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Okay.

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So inside of here, we want to check if Val is equal to one, then print out

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the value is one.

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And we're going to have a couple of print statements.

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So let's go ahead and do this.

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ELTs, if Val is greater than 50, print out.

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The value is greater than 50.

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Else if the val is.

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Less than 25.

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We want to print out

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the value is less than 25.

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Else.

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Print out the value is greater than 25, but less than 50.

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So now if we call this function control flow, let's pass in the value five and let's see what is returned.

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The value is less than 25.

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That is correct.

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If we pass in 500.

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The value is greater than 50.

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That is correct.

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If we pass in one.

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Value is one.

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That is correct.

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If we pass in 25, the value is greater than 25, but less than 50.

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And that is also correct, because we did not use an equal sign here.

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Or here.

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So now if we run this, we will see.

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Value is less than 25 because now we are also including the value 25.

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So hopefully you were able to understand and accomplish these questions with ease.

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And if you were, then you are definitely ready to move on to the next section where we begin talking

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about ownership.