In this tutorial, I will show you have to create a print pyramid using the Java programming language.
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Program Listing
/* Half_Pyramid.java
* Mr. Jake Rodriguez Pomperada,MAED-IT, MIT
* www.jakerpomperada.com www.jakerpomperada.blogspot.com
* jakerpomperada@gmail.com
* Bacolod City, Negros Occidental Philippines
*/
import java.util.Scanner;
public class Half_Pyramid {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
int number = 0;
Scanner input = new Scanner(System.in);
boolean valid;
do {
System.out.println();
System.out.print("\tPrint Half Pyramid in Java\n\n");
System.out.print("Enter Number: ");
// read the number
number = input.nextInt();
valid = (number >= 2 && number <= 10);
if (!valid) {
System.out.println("\nValues less than 2 or more then 10 are invalid input. Try Again. ");
}
else {
// outer loop for row
for (int i=1; i <= number; i++) {
// inner loop for column
for(int j=1; j <= i; j++) {
// print star
System.out.print("* ");
}
// new line
System.out.println();
}
}
}while (!valid);
System.out.println();
System.out.println("End of Program");
//close the reader
input.close();
}
}
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