Print the pattern by using one loop | Set 2 (Using Continue Statement)

Difficulty Level : Easy
Last Updated : 23 Apr, 2021

Given a number n, print triangular pattern. We are allowed to use only one loop.
Example:

Input: 7
Output:
*
* * 
* * *
* * * *
* * * * *
* * * * * *
* * * * * * *

We use single for-loop and in the loop we maintain two variables for line count and current star count. If current star count is less than current line count, we print a star and continue. Else we print a new line and increment line count.

C

// C++ program to print a pattern using single
// loop and continue statement
#include<bits/stdc++.h>
using namespace std;
 
// printPattern function to print pattern
void printPattern(int n)
{
    // Variable initialization
    int line_no = 1; // Line count
 
    // Loop to print desired pattern
    int curr_star = 0;
    for (int line_no = 1; line_no <= n; )
    {
        // If current star count is less than
        // current line number
        if (curr_star < line_no)
        {
           cout << "* ";
           curr_star++;
           continue;
        }
 
        // Else time to print a new line
        if (curr_star == line_no)
        {
           cout << "\n";
           line_no++;
           curr_star = 0;
        }
    }
}
 
// Driver code
int main()
{
    printPattern(7);
    return 0;
}

Java

// Java program to print a pattern using single
// loop and continue statement
import java.io.*;
 
class GFG {
 
    // printPattern function to print pattern
    static void printPattern(int n)
    {
        // Variable initialization
        // Line count
        int line_no = 1;
     
        // Loop to print desired pattern
        int curr_star = 0;
        for ( line_no = 1; line_no <= n;)
        {
            // If current star count is less than
            // current line number
            if (curr_star < line_no)
            {
                System.out.print ( "* ");
                curr_star++;
                continue;
            }
     
            // Else time to print a new line
            if (curr_star == line_no)
            {
                System.out.println ("");
                line_no++;
                curr_star = 0;
            }
        }
    }
     
    // Driver code
    public static void main (String[] args)
    {
            printPattern(7);
    }
}
 
// This code is contributed by vt_m

Python 3

# Python 3 program to print
# a pattern using single
# loop and continue statement
 
# printPattern function
# to print pattern
def printPattern(n):
 
    # Variable initialization
    line_no = 1 # Line count
 
    # Loop to print
    # desired pattern
    curr_star = 0
    line_no = 1
    while(line_no <= n ):
     
        # If current star count
        # is less than current
        # line number
        if (curr_star < line_no):
            print("* ", end = "")
            curr_star += 1
            continue
         
        # Else time to print
        # a new line
        if (curr_star == line_no):
            print("")
            line_no += 1
            curr_star = 0
         
# Driver code
printPattern(7)
 
# This code is contributed
# by Smitha

C#

// C# program to print a pattern using single
// loop and continue statement
using System;
 
class GFG {
 
    // printPattern function to print pattern
    static void printPattern(int n)
    {
        // Variable initialization
        // Line count
        int line_no = 1;
     
        // Loop to print desired pattern
        int curr_star = 0;
        for ( line_no = 1; line_no <= n;)
        {
            // If current star count is less than
            // current line number
            if (curr_star < line_no)
            {
                Console.Write ( "* ");
                curr_star++;
                continue;
            }
     
            // Else time to print a new line
            if (curr_star == line_no)
            {
                Console.WriteLine ();
                line_no++;
                curr_star = 0;
            }
        }
    }
     
    // Driver code
    public static void Main ()
    {
            printPattern(7);
    }
}
 
// This code is contributed by vt_m

PHP

<?php
// php program to print a
// pattern using single loop
// and continue statement
 
// printPattern function
// to print pattern
function printPattern($n)
{
     
    // Variable initialization
    $line_no = 1; // Line count
 
    // Loop to print desired pattern
    $curr_star = 0;
    for ($line_no = 1; $line_no <= $n😉
    {
         
        // If current star count is less
        // than current line number
        if ($curr_star < $line_no)
        {
            echo "* ";
            $curr_star++;
            continue;
        }
 
        // Else time to print
        // a new line
        if ($curr_star == $line_no)
        {
            echo "\n";
            $line_no++;
            $curr_star = 0;
        }
    }
}
 
    // Driver code
    $n=7;
    printPattern($n);
 
// This code is contributed by mits
?>

Javascript

<script>
      // JavaScript program to print a pattern using single
      // loop and continue statement
 
      // printPattern function to print pattern
      function printPattern(n)
      {
       
        // Variable initialization
        var line_no = 1; // Line count
 
        // Loop to print desired pattern
        var curr_star = 0;
        for (var line_no = 1; line_no <= n; )
        {
         
          // If current star count is less than
          // current line number
          if (curr_star < line_no)
          {
            document.write("* ");
            curr_star++;
            continue;
          }
 
          // Else time to print a new line
          if (curr_star == line_no)
          {
            document.write("<br>");
            line_no++;
            curr_star = 0;
          }
        }
      }
 
      // Driver code
      printPattern(7);
       
      // This code is contributed by rdtank.
    </script>

Output:

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

Time Complexity: O(n)

Auxiliary Space: O(1)
Please refer below post for one more approach.
Print pattern using only one loop
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Print the pattern by using one loop | Set 2 (Using Continue Statement)

C

Java

Python 3

C#

PHP

Javascript

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