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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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