WEBVTT

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We went over some simple functions last time but today was talk about giving functions arguments or

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parameters.

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I said that the parentheses in the function signature can hold variables that we can pass values into.

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So let's see how we could do that.

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So let's say we had a function call it value and give it a an argument in X or parameter index.

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So it's really just like declaring a variable.

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So X can be used in the print value function to do any calculations that print value needs to do.

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And if you remember the scope lecture X is the PSK the scope of index is really just the the scope of

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the print value function in general.

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So you can only use X in the print value function.

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So let's just say see each integer.

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It's X and know that and let's call the Felty function.

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And we just need to give it an integer.

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So this B since x is also part of the signature of the function the caller must provide a value to pass

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into it.

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So that's what we're doing in in here.

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So you see what happens.

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So not surprisingly it just says the integer is five.

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Now it doesn't we don't have to just give it literal values like 5 you could have like variables say

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10 Zad is to 10 and say you said hey and print out 10 can also have say arithmetic operations so say

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Zad plus 20.

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It should print out 30 right because it'll actually do the math the evaluation of the addition here

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and then pass to the print value function and then print out the result.

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So it doesn't all have to be just one argument you could have multiple arguments.

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So how to do that is we have a comma between all of our arguments.

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You can have char c that floats while say and we have to update our function signature down here as

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well in that definition.

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See why

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if we call this now we have to call it with all three of those values.

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And say and or is here to say out

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character is C an inch

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float is

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y.

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And that's C all three values that we put into print value are being outputted.

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So that's how you can have multiple parameters in a in a function.

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So we'll be talking about crammer's in arguments bit more a bit later in a different section but we

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don't have tools to talk about it quite yet.

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So we need to actually go over those tools and we'll do that in a bit of a later section and I'll show

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you some more interesting things they can do.

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RAMmers So in the next lecture we're in talk about return about this.