What does ":" do in c++

Question

Saw this in my c++ book, yet its not explained there

Answer 1

I think is just Synstax. Just to make code more readeble,

here look

#include <iostream>

using namespace std;

class Box {
public:
double length; // Length of a box
double breadth; // Breadth of a box
double height; // Height of a box
};

See the word special key name public:
so if : in the end is more readeble for a coder to know everithyng after : is public.
until end of scope

Answer 2

i’m not sure...
class_derivated: class_base
?

it’s analog to reservated word “extends” in java?

Answer 3

You also use it to define labels.

goto error;
...
error:
...

You also use it do define cases in a switch statement.

switch(x){
case 1:
...
}

Answer 4

thank you for your answers, learned a lot, I posted a new question that is related to this one. Check that out if you want.

Answer 5

Ternary operator also make use of colon, for separating the true and false block of code to execute.

<condition> ? <true block> : <false block>

Answer 6

Its a way of seperating a code block. Usually curly bracket do this. But at some poits : is used. Its just syntax. its how the compiler was designed...