C++ program to display natural numbers from 1 to n | 5 different ways

C++ program to display natural numbers from 1 to n | 5 different ways

In this tutorial, we will discuss the C++ program to display natural numbers from 1 to n through different 5 ways

In this post, we are going to learn how to print natural number from 1 to entered number in different 5 ways

Program 1

C++ code to display natural numbers Using for loop

This program allows the user to enter a maximum number. and then, it displays natural numbers from 1 to given number using for loop in C++ language

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
     int num,i;
     cout << "Enter the Maximum number: " << endl;
    cin>>num; //get input from user

    cout<<"First "<<num<<"Natural numbers are:"<<"\n";
    for(i=1; i<=num; i++){
        cout<<i;
        cout<<" ";
    }
    getch();
    return 0;

    return 0;
}

When the above code is executed it produces the following output

Enter the maximum number:
25
First 25 Natural numbers are:
1 2 3 4 5  7 8 9 10 11 12 13 14 15 1 17 18 19 20 21 22 23 24 25

 

C++ code to display natural numbers Using while loop

This program allows the user to enter a maximum number. and then,it displays natural numbers from 1 to given number using while loop in C++ language

Program 2

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
     int num,i;
     cout << "Enter the Maximum number for num: " << endl;
    cin>>num; //get input from user

    cout<<"First "<<num<<" Natural numbers are:"<<"\n";
    i=1;
    while( i<=num ){
        cout<<i;
        cout<<" ";
        i++;
    }
    getch();
    return 0;

    return 0;
}

When the above code is executed it produces the following output

Enter the maximum number for num
15
First 15 Natural numbers are:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

 

C++ code to display natural numbers Using do-while loop

This program allows the user to enter a maximum number. and then, it displays natural numbers from 1 to given number using do-while loop in C++

Program 3

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
     int num,i;
     cout << "Enter the Maximum number: " << endl;
    cin>>num; //get input from user

    cout<<"First "<<num<<"Natural numbers are:"<<"\n";
    i=1;
    do{
        cout<<i;
        cout<<" ";
        i++;
    }while( i<=num );
    getch();
    return 0;

    return 0;
}

When the above code is executed it produces the following output

Enter the maximum number:
20
First 20 Natural numbers are:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 17 18 19 20

 

C++ code to print natural numbers Using function

This program allows the user to enter a maximum number. and then, it displays natural numbers from 1 to given number using function in C++

Program 4

#include <iostream>
#include <conio.h>
using namespace std;

int naturalNum(int num);
int main()
{
    int num;
    cout<<"Enter the Maximum number: "<<"\n";
    cin>>num; //get input from user

    cout<<"First "<<num<<" Natural numbers are: "<<"\n";
    int result=naturalNum(num);
    cout<<result;

    getch();
    return 0;
}
int naturalNum(int num){
    int i;
    for(i=1; i<num; i++){
cout<<i;
  cout<<" ";
    }



}

When the above code is executed it produces the following output

Enter the maximum number:
15
First 15 Natural numbers are:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

 

C++ code to print natural numbers Using recursion

This program allows the user to enter a maximum number. and then,it displays natural numbers from 1 to given number using recursion in C++

Program 5

#include <iostream>
#include <conio.h>
using namespace std;

int naturalNum(int lower_Limit, int upper_Limit);
int main()
{
 int lower_Limit=1,upper_Limit;
    cout<<"Enter the Maximum number:"<<"\n";
    cin>>upper_Limit; //get input from user

    cout<<"First "<<upper_Limit<<" Natural numbers are:"<<endl;


    naturalNum(lower_Limit,upper_Limit);

    getch();
    return 0;
}
int naturalNum(int lower_Limit,int upper_Limit){
    if(lower_Limit>upper_Limit)
        return 0;
    cout<<lower_Limit;
    cout<<" ";
naturalNum(lower_Limit+1,upper_Limit);
    }

When the above code is executed it produces the following output

Enter the maximum number:
18
First 18 Natural numbers are:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 17 18

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