Question

write a program in C++ to display the following pattern. 1
1 2
1 2 3
1 2 3 4
1 2 3 4 5

Answer 1

Bellow are the code in c++ language for the above question:

Explanation:

#include <iostream> //header file.

using namespace std;

int main() //main function definition.

{

   float size,i,j; //variable declaration.

   cout<<"Enter the size of the series"; //print the message to the user.

   cin>>size;//take the input from the user.

  for(i=1;i<=size;i++)//first for loop.

  {

    for(j=1;j<=i;j++)//second for loop.

     cout<<j<<" ";// print the series.

    cout<<"\n"; //to change the line.

  }

   

   return 0; //return statement.

}

Output:

• If the user inputs 1 then it will prints only 1.
• If the user inputs 5 then it will prints the above series.

Code Explanation :

• The above code is in c++ language, in which the size is needed to enter by the user.
• Then there are two for loop in which, first is used to decide the size of the series and the second is used to decide the length of the series.

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