Print pattern using only one loop | Set 1 (Using setw)

Print simple patterns like below using single line of code under loop.

Examples:

Input : 5
Output :
    *
   **
  ***
 ****
*****

Input : 6
Output :
     *
    **
   ***
  ****
 *****
******

setw(n) Creates n columns and fills these n columns from right. We fill i of them with a given character, here we create a string with i asterisks using string constructor.



setfill() Used to set fill character in a stream. Here we use it to fill remaining n-i-1 places with space (or ‘ ‘) in n columns.

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// CPP program to print a pattern  using only
// one loop.  <iomanip> is header file for stfill()
// and setw()
#include<iostream>
#include<iomanip>
using namespace std;
  
void generatePattern(int n)
{
    // Iterate for n lines
    for (int i=1 ; i<=n ; i++)
        cout << setfill(' ') << setw(n)
             << string(i, '*') << endl;
  
    // Remove multi-line commenting characters below
    // to get PATTERN WITH CHARACTERS IN LEFT AND 
    // SPACE IN RIGHT
    /* for (int i=1 ; i<=n ; i++)
        cout << left << setfill(' ')
             << setw(n) << string(i,'*') << endl; */
}
  
// Driver code
int main()
{
    int n = 6;
    generatePattern(n);
    return 0;
}

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Output:

     *
    **
   ***
  ****
 *****
******

Please refer below post for one more approach.
Print pattern using only one loop | Set 2 (Using Continue)

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