Given the value of n, print the arrow pattern.
Examples :
Input : n = 5 Output : * ** *** **** ***** **** *** ** * Input : n = 7 Output : * ** *** **** ***** ****** ******* ****** ***** **** *** ** *
Below is the program to print the arrow pattern:
C++
// C++ program to print the // arrow pattern #include <bits/stdc++.h> using namespace std;
// Function to print pattern void print_arrow( int n)
{ // for printing upper part
// of the arrow
for ( int i = 1; i < n; i++) {
// To give space before printing
// stars in upper part of arrow
for ( int j = 0; j < i; j++) {
cout << " " ;
}
// To print stars in upper
// part of the arrow
for ( int k = 0; k < i; k++) {
cout << "*" ;
}
cout << "\n" ;
}
// for printing lower part
// of the arrow
for ( int i = 0; i < n; i++) {
// To give space before printing
// stars in lower part of arrow
for ( int j = 0; j < n - i; j++) {
cout << " " ;
}
// To print stars in lower
// part of the arrow
for ( int k = 0; k < n - i; k++) {
cout << "*" ;
}
cout << "\n" ;
}
} // Driver code int main()
{ // taking input from user
int n = 5;
// function calling
print_arrow(n);
return 0;
} |
Java
// Java program to print the // arrow pattern import java.io.*;
class GFG {
// Function to print pattern static void print_arrow( int n)
{ // for printing upper part
// of the arrow
for ( int i = 1 ; i < n; i++) {
// To give space before printing
// stars in upper part of arrow
for ( int j = 0 ; j < i; j++) {
System.out.print( " " );
}
// To print stars in upper
// part of the arrow
for ( int k = 0 ; k < i; k++) {
System.out.print( "*" );
}
System.out.println();
}
// for printing lower part
// of the arrow
for ( int i = 0 ; i < n; i++) {
// To give space before printing
// stars in lower part of arrow
for ( int j = 0 ; j < n - i; j++) {
System.out.print( " " );
}
// To print stars in lower
// part of the arrow
for ( int k = 0 ; k < n - i; k++) {
System.out.print( "*" );
}
System.out.println();
}
} public static void main (String[] args)
{
// taking input from user
int n = 5 ;
// function calling
print_arrow(n);
}
} // This code is contributed by Gitanjali. |
Python3
# Python program to print the # arrow pattern import math
# Function to print pattern def print_arrow(n):
# for printing upper part
# of the arrow
for i in range ( 1 ,n):
# To give space before printing
# stars in upper part of arrow
for j in range ( 0 ,i):
print ( " " ,end = "")
# To print stars in upper
# part of the arrow
for k in range ( 0 ,i):
print ( "*" ,end = "")
print ()
# for printing lower part
# of the arrow
for i in range ( 0 ,n):
# To give space before printing
# stars in lower part of arrow
for j in range ( 0 ,n - i):
print ( " " ,end = "")
# To print stars in lower
# part of the arrow
for k in range ( 0 ,n - i):
print ( "*" ,end = "")
print ()
#driver code n = 5
# function calling print_arrow(n) # This code is contributed by Gitanjali. |
C#
// C# program to print // the arrow pattern using System;
class GFG {
// Function to print pattern
static void print_arrow( int n)
{
// for printing upper
// part of the arrow
for ( int i = 1; i < n; i++) {
// To give space before printing
// stars in upper part of arrow
for ( int j = 0; j < i; j++) {
Console.Write( " " );
}
// To print stars in upper
// part of the arrow
for ( int k = 0; k < i; k++) {
Console.Write( "*" );
}
Console.WriteLine();
}
// for printing lower
// part of the arrow
for ( int i = 0; i < n; i++) {
// To give space before printing
// stars in lower part of arrow
for ( int j = 0; j < n - i; j++) {
Console.Write( " " );
}
// To print stars in lower
// part of the arrow
for ( int k = 0; k < n - i; k++) {
Console.Write( "*" );
}
Console.WriteLine();
}
}
// Driver code
public static void Main()
{
// taking input from user
int n = 5;
// function calling
print_arrow(n);
}
} // This code is contributed by vt_m. |
PHP
<?php // PHP implementation to print // the arrow pattern // Function to print pattern function print_arrow( $n )
{ // for printing upper part
// of the arrow
for ( $i = 1; $i < $n ; $i ++)
{
// To give space before printing
// stars in upper part of arrow
for ( $j = 0; $j < $i ; $j ++)
{
echo " " ;
}
// To print stars in upper
// part of the arrow
for ( $k = 0; $k < $i ; $k ++)
{
echo "*" ;
}
echo "\n" ;
}
// for printing lower part
// of the arrow
for ( $i = 0; $i < $n ; $i ++)
{
// To give space before printing
// stars in lower part of arrow
for ( $j = 0; $j < $n - $i ; $j ++)
{
echo " " ;
}
// To print stars in lower
// part of the arrow
for ( $k = 0; $k < $n - $i ; $k ++)
{
echo "*" ;
}
echo "\n" ;
}
} // Driver code $n = 5;
print_arrow( $n );
// This code is contributed by Mithun Kumar ?> |
Javascript
<script> // JavaScript program to print the
// arrow pattern
// Function to print pattern
function print_arrow(n)
{
// for printing upper part
// of the arrow
for ( var i = 1; i < n; i++)
{
// To give space before printing
// stars in upper part of arrow
for ( var j = 0; j < i; j++)
{
document.write( " " );
}
// To print stars in upper
// part of the arrow
for ( var k = 0; k < i; k++) {
document.write( "*" );
}
document.write( "<br>" );
}
// for printing lower part
// of the arrow
for ( var i = 0; i < n; i++)
{
// To give space before printing
// stars in lower part of arrow
for ( var j = 0; j < n - i; j++)
{
document.write( " " );
}
// To print stars in lower
// part of the arrow
for ( var k = 0; k < n - i; k++)
{
document.write( "*" );
}
document.write( "<br>" );
}
}
// Driver code
// taking input from user
var n = 5;
// function calling
print_arrow(n);
</script> |
Output:
* ** *** **** ***** **** *** ** *
Time Complexity: O(n2)
Auxiliary Space: O(1)
Another method:
C++
// C++ program to print the // arrow pattern #include <iostream> #include<stdlib.h> using namespace std;
class gfg
{ public : void print_arrow( int n)
{ // Total no of rows
for ( int i = 0; i < n + n - 1; i++)
{
int size = i;
if (i >= n)
{
size = n + n - i - 2;
}
// cols in each row
for ( int j = 0; j <= size + size; j++)
{
if (j < size) // For printing space
{
cout<< " " ;
}
else // For printing *
{
cout<< "*" ;
}
}
cout<< "\n" ;
}
}
}; // Driver code int main()
{ gfg g;
// taking input from user
int n = 5;
// function calling
g.print_arrow(n);
return 0;
} |
C
// C program to print the // arrow pattern #include <stdio.h> #include<stdlib.h> void print_arrow( int n)
{ // Total no of rows
for ( int i = 0; i < n + n - 1; i++)
{
int size = i;
if (i >= n)
{
size = n + n - i - 2;
}
// cols in each row
for ( int j = 0; j <= size + size; j++)
{
if (j < size) // For printing space
{
printf ( " " );
}
else // For printing *
{
printf ( "*" );
}
}
printf ( "\n" );
}
} // Driver code int main()
{ // taking input from user
int n = 5;
// function calling
print_arrow(n);
return 0;
} |
Java
// Java program to print the // arrow pattern class GFG
{ static void print_arrow( int n)
{ // Total no of rows
for ( int i = 0 ; i < n + n - 1 ; i++)
{
int size = i;
if (i >= n)
{
size = n + n - i - 2 ;
}
// cols in each row
for ( int j = 0 ; j <= size + size; j++)
{
if (j < size) // For printing space
{
System.out.print( " " );
}
else // For printing *
{
System.out.print( "*" );
}
}
System.out.print( "\n" );
}
} // Driver code public static void main(String args[])
{ // taking input from user
int n = 5 ;
// function calling
print_arrow(n);
} } // This code is contributed // by Akanksha Rai |
Python3
# Python 3 program to print the # arrow pattern def print_arrow(n):
# Total no of rows
for i in range (n + n - 1 ):
size = i
if i > = n:
size = n + n - i - 2
# cols in each row
for j in range (size + size):
if j < size: # For printing space
print ( ' ' , end = '')
else : # For printing *
print ( '*' , end = '')
print ()
# Driver code # taking input from user n = 5
# function calling print_arrow(n) # This code is contributed # by SamyuktaSHegde. |
C#
// C# program to print the // arrow pattern using System;
class GFG
{ static void print_arrow( int n)
{ // Total no of rows
for ( int i = 0; i < n + n - 1; i++)
{
int size = i;
if (i >= n)
{
size = n + n - i - 2;
}
// cols in each row
for ( int j = 0; j <= size + size; j++)
{
if (j < size) // For printing space
{
Console.Write( " " );
}
else // For printing *
{
Console.Write( "*" );
}
}
Console.Write( "\n" );
}
} // Driver code public static void Main()
{ // taking input from user
int n = 5;
// function calling
print_arrow(n);
} } // This code is contributed // by Akanksha Rai |
Javascript
<script> // javascript program to print the // arrow pattern function print_arrow(n)
{ // Total no of rows
for ( var i = 0; i < n + n - 1; i++)
{
var size = i;
if (i >= n)
{
size = n + n - i - 2;
}
// cols in each row
for ( var j = 0; j <= size + size; j++)
{
if (j < size) // For printing space
{
document.write( " " );
}
else // For printing *
{
document.write( "*" );
}
}
document.write( "<br>" );
}
} // Driver code // taking input from user var n = 5;
// function calling print_arrow(n); // This code is contributed by Princi Singh </script> |
Output:
* ** *** **** ***** **** *** ** *
Time Complexity: O(N2)
Auxiliary Space: O(1)