Functions and Parameters C++ - Reading Assignment

C++ Programming
#542

  1. What is a function parameter?
    A variable used in a function. They always begin with a value provided by the caller of the function.

  2. Why do functions need parameters?
    They are the input for the function to work.

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#543
  1. A function parameter is a variable used in a function.
  2. Functions need parameters to get variables that it will need that are not defined in the function itself.
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#544

1. What is a function parameter?
They are variables used in a function, whose values are initialized by the function caller.

2. Why do functions need parameters?
Using parameters initialized by the function caller allows for more versatile application of the function.

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#545
  1. It is a variable used within a function.
  2. They need parameters in order to execute the function and get the return value of the function.
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#546

1. What is a function parameter? - It is a variable defined within a function, these are always initialized with a value provided by the caller of the function.
2. Why do functions need parameters? - So that they can be resuable.

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#547

1. What is a function parameter?
The data that is passed to the function via its arguments to be manipulated by the function.

2. Why do functions need parameters?
Not all functions need parameters. Only those that do something with the input data need parameters.

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#548
  1. A function parameter is the input given to a function.
  2. Functions needs parameters so they know what to look for when given input.
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#549

  1. What is a function parameter? A function parameter is a variable used in a function.

  2. Why do functions need parameters? Parameters are essential to functions, because otherwise you can’t give the function-machine an input.

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#550
  1. A function parameter is a variable used in a function that is always initialized with a value provided by the caller of the function
  2. To allow for variations in the input values on which the function will be performed.
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#551 
	int input{};

what is this variable?

#552

Its an int variable. Not sure what it means since I don’t know where its used.

#553

1. What is a function parameter?
They are the variables used inside a function, but they are initialized with a value by the caller of the function that may as well be another function.

2. Why do functions need parameters?

some functions DO NOT need parameters, but parameters are useful for manipulating variables, we can do anything is possible with them, and then return something, or not.

#554

hi @Alko89 , I think @chen was asking why in the definition of this variable:

int input{};

they put curly braces after the name of the variable. I also have the same question :nerd_face:

#555

Its a so called list initialization ({} is the default initialization, in this case 0). Its kind of the same than using = operator, but it does not allow narrowing. Meaning:

• An integer cannot be converted to another integer that cannot hold its value. For example,
char to int is allowed, but not int to char.
• A floating-point value cannot be converted to another floating-point type that cannot hold its
value. For example, float to double is allowed, but not double to float.
• A floating-point value cannot be converted to an integer type.
• An integer value cannot be converted to a floating-point type.

Copied from here :stuck_out_tongue:
https://raw.githubusercontent.com/boydfd/books/master/seeing/stalled/2013%20Stroustrup%20-%20The%20C%2B%2B%20Programming%20Language%204th%20Edition.pdf

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#556
  1. What is a function parameter?
    It’s a parameter you can pass to the function
  2. Why do functions need parameters?
    So that functions can “react” (elaborate ) to the parameters values.
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#557
  1. Function parameters are inputs that have to be defined when the function is run
  2. Functions need parameter to make one time functions reusable
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#558

1. What is a function parameter?
A variable defined and placed between the parenthesis in the function declaration and used in a function.
The difference between a function parameter and a variable defined inside the function is, that it is always started with the (return) value
from the caller of the function.

2. Why do functions need parameters?
The parameters tell’s the function what it has to execute.

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#559
  1. a variable used within a function
  2. They need parameters if you want your function to execute without knowing specific input values.
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#560
  1. the values used in the function e.g 4,5
  2. it gves the function a problem to solve and not just hypothetical use
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#561

Hi Ivan,

  1. a function Parameter is a variable used in a function. FP’s work almost identically to local variables that can only be used within a specific function.

2)Function parameters and return values are the key mechanisms by which functions can be written in a reusable way, as it allows us to write functions that can perform tasks and return retrieved or calculated results back to the caller without knowing what the specific inputs or outputs are ahead of time.

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