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Copy pathLoopPatterns.java
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66 lines (59 loc) · 1.79 KB
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import java.util.Scanner;
public class LoopPatterns {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("welcome to print patterns");
System.out.println("please enter number of rows:");
int rows = input.nextInt();
printRightHalfPyramid(rows);
printReverseRightHalfPyramid(rows);
printLeftHalfPyramid(rows);
}
public static void printReverseRightHalfPyramid(int maxRows) {
System.out.println("\nHere is Reverse Right Half Pyramid");
int rows = maxRows;
while (rows > 0) {
int i = 0;
while (i < rows) {
System.out.print("* ");
i++;
}
System.out.println();
rows--;
}
}
public static void printRightHalfPyramid(int maxRows) {
System.out.println("\nHere is Right Half Pyramid");
int rows = 0;
while (rows < maxRows) {
System.out.print("*");
int i = 0;
while (i < rows) {
System.out.print(" *");
i++;
}
System.out.println();
rows++;
}
}
public static void printLeftHalfPyramid(int maxRows) {
System.out.println("\nHere is Left Half Pyramid");
int rows = maxRows;
while (rows > 0) {
// this loop prints spaces
int j = 0;
while (j < rows - 1) {
System.out.print(" ");
j++;
}
// this loop prints stars
int i = 0;
while (i <= (maxRows-rows)) {
System.out.print("* ");
i++;
}
System.out.println();
rows--;
}
}
}