Program to Print Hollow Sandglass Star Pattern
In this article we are going to see how to print Hollow sand glass star program.
Example-1 When row value=4 * * * * * * * * * * * * * * * * *
Example-2: When row value=5 * * * * * * * * * * * * * * * * * * * * * * *
Now, let’s see the actual program how to print it.
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Approach:
- Enter total row and store it in an integer variable
row
. - Take first for loop to print upper hollow part .
- Take first inner for loop to print spaces .
- Take second inner for loop to print stars according to the condition
if(r == 1 || c == r|| c == row )
- Take first for loop to print upper hollow part .
- Take first inner for loop to print spaces .
- Take second inner for loop to print stars according to the condition
if(r == 1 || c == r || c == row)
- Then go on printing the star symbol according to loop
JAVA Code:
Method-1 : Static Star Character
import java.util.*; public class Main { public static void main(String args[]) { // taking variable for loop iteration and row . int row,r,c,d; //creating object Scanner s = new Scanner(System.in); // entering the number of row System.out.print("Enter rows : "); row = s.nextInt(); //outer for loop // this for loop is responsible to print upper hollow part. for (r = 1; r<= row ; r++) { for (c = 1; c < r; c++) System.out.print(" "); for (c = r; c <= row ; c++) { if(r == 1 || c == r|| c == row ) System.out.print("* "); else System.out.print(" "); } System.out.println(); } // this for loop is responsible to print lower hollow part. for (r = row -1; r >= 1;r--) { for (c = 1; c < r; c++) System.out.print(" "); for (c = r; c <= row; c++) { if(r == 1 || c == r || c == row) System.out.print("* "); else System.out.print(" "); } System.out.println(); } } }
Output : Enter row : 5 * * * * * * * * * * * * * * * * * * * * * * *
Method-2 : User Input Character
import java.util.*; public class Main { public static void main(String args[]) { // taking variable for loop iteration and row . int row,r,c,d; char ch; //creating object Scanner s = new Scanner(System.in); // entering the number of row System.out.print("Enter rows : "); row = s.nextInt(); // entering any random character System.out.print("Enter character : "); ch = s.next().charAt(0); //outer for loop // this for loop is responsible to print upper hollow part. for (r = 1; r<= row ; r++) { for (c = 1; c < r; c++) System.out.print(" "); for (c = r; c <= row ; c++) { if(r == 1 || c == r|| c == row ) System.out.print(ch+" "); else System.out.print(" "); } System.out.println(); } // this for loop is responsible to print lower hollow part. for (r = row -1; r >= 1;r--) { for (c = 1; c < r; c++) System.out.print(" "); for (c = r; c <= row; c++) { if(r == 1 || c == r || c == row) System.out.print(ch+" "); else System.out.print(" "); } System.out.println(); } } }
Output : Enter row : 5 Enter character : * * * * * * * * * * * * * * * * * * * * * * * *
C Code:
#include <stdio.h> int main() { int r, row, c ,d; printf("Enter rows: "); scanf("%d", &row); for (r = 1; r<= row ; r++) { for (c = 1; c < r; c++) printf(" "); for (c = r; c <= row ; c++) { if(r == 1 || c == r|| c == row ) printf("* "); else printf(" "); } printf("\n"); } for (r = row -1; r >= 1;r--) { for (c = 1; c < r; c++) printf(" "); for (c = r; c <= row; c++) { if(r == 1 || c == r || c == row) printf("* "); else printf(" "); } printf("\n"); } return 0; }
Output : Enter row : 5 * * * * * * * * * * * * * * * * * * * * * * *
C++ Code:
#include <iostream> using namespace std; int main() { int row, r , c ,d ; cout << "Enter rows: "; cin >> row; for (r = 1; r<= row ; r++) { for (c = 1; c < r; c++) cout << " "; for (c = r; c <= row ; c++) { if(r == 1 || c == r|| c == row ) cout <<"* "; else cout <<" "; } cout <<"\n"; } for (r = row -1; r >= 1;r--) { for (c = 1; c < r; c++) cout <<" "; for (c = r; c <= row; c++) { if(r == 1 || c == r || c == row) cout <<"* "; else cout <<" "; } cout << "\n"; } return 0; }
Output : Enter row : 5 * * * * * * * * * * * * * * * * * * * * * * *
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