Question

write a program in java to generate the following output 1 2 3 4 5 6 7 8 9 10 ​

Answer 1

Answer:

Hey your required answer is given below .

Explanation:

perm_identity

Print the following pyramid pattern

Given a positive integer n. The problem is to print the pyramid pattern as described in the examples below.

Examples:

Input : n = 4 Output : 1 3*2 4*5*6 10*9*8*7 Input : n = 5 Output : 1 3*2 4*5*6 10*9*8*7 11*12*13*14*15

Approach: For odd number row, values are being displayed in increasing order and for even number row, values are being displayed in decreasing order. The only other trick is to how to iterate the loops.

Algorithm:

printPattern(int n) Declare j, k Initialize k = 0 for i = 1 to n if i%2 != 0 for j = k+1, j < k+i, j++ print j and "*" print j and new line k = ++j else k = k+i-1 for j = k, j > k-i+1, j-- print j and "*"; print j and new line

C++

// C++ implementation to print the following  

// pyramid pattern

#include <bits/stdc++.h>

using namespace std;

 

// function to print the following pyramid pattern

void printPattern(int n)

{

   int j, k = 0;

     

   // loop to decide the row number

   for (int i=1; i<=n; i++)

   {

       // if row number is odd

       if (i%2 != 0)

       {

           // print numbers with the '*' sign in  

           // increasing order

           for (j=k+1; j<k+i; j++)

               cout << j << "*";

           cout << j++ << endl;

             

           // update value of 'k'    

           k = j;    

       }

         

       // if row number is even

       else

       {

           // update value of 'k'

           k = k+i-1;

             

           // print numbers with the '*' in  

           // decreasing order

           for (j=k; j>k-i+1; j--)

               cout << j << "*";

           cout << j << endl;    

       }

   }

}

 

// Driver program to test above

int main()

{

   int n = 5;

   printPattern(n);

   return 0;

}  

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