Restyle Create PascalTriangle.java

PascalTriangle.java

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+
+import java.util.*;
+public class PascalTriangle {
+
+  static int facto(int n) {
+    int factorial;
+
+    for (factorial = 1; n > 1; n--) {
+      factorial *= n;
+    }
+    return factorial;
+  }
+  static int ncr(int n, int r) { return facto(n) / (facto(n - r) * facto(r)); }
+  public static void main(String args[]) {
+    int rows, i, j;
+
+    // getting number of rows from user
+    System.out.println("N:");
+    Scanner scanner = new Scanner(System.in);
+    rows = scanner.nextInt();
+    scanner.close();
+    if (rows > 10) {
+      System.out.println("Invalid number of rows(rows<=10)");
+      return;
+    } else {
+      System.out.println("Pascal Triangle:");
+      for (i = 0; i < rows; i++) {
+        for (j = 0; j < rows - i; j++) {
+          System.out.print(" ");
+        }
+        for (j = 0; j <= i; j++) {
+          System.out.print(" " + ncr(i, j));
+        }
+        System.out.println();
+      }
+    }
+  }
+}