C++ - ITERATING SET

There are many ways by which we can Iterate a set.

So we have a set with values, Tom, John and C++.

Now, let us see the first and easiest way to iterate a set.

Iterating a set using 'for range' loop

Example :

#include <iostream>
#include <set>

using namespace std;


int main() {
        
    set<string> x; 
        
    x.insert("Tom");
    x.insert("John");
    x.insert("C++");
        
    for (string i : x)  
    {  
        cout << i << endl;  
    }
        
    return 0;    
}

Output :

C++
John
Tom

Similarly, in the above code we have created a set.

set<string> x;

And initialised to the variable x. And as we know the elements in a Set are inserted in Sorted order.

In the next line we have used the for loop to Iterate through the set.

for (string i : x)
{
	cout << i << endl;
}

Now, if we see the iterations of for loop,

for (string i : x)
{
	cout << i << endl;
}

1st Iteration

In the first Iteration the first value of the set x (i.e. C++) is taken and put into the variable i.

And the print statement, prints the value of i.

Output :

C++

2nd Iteration

Similarly, in the second Iteration the second value of the set x (i.e. John) is taken and put into the variable i.

And the print statement, prints the value of i.

Output :

C++
John

3rd Iteration

Similarly, in the third Iteration the third value of the set x (i.e. Tom) is taken and put into the variable i.

And the print statement, prints the value of i.

Output :

C++
John
Tom

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