Right Angled Triangle in Java Example

Algorithm for Right Angled Triangle:

step 1: Set i= 0,j 0, row=0,osc=0,var=0

step 2: Read row

step 3: Move to new line

step4: If (row>O) then execute following steps else goto step-23

step 5: Initialize isc=0

step 6: Print “*”

step 7: Initialize i=2

step 8: Repeat through step-17while (i<row)

step 9: Print “*”

step l0: Initialize j=isc

step 11: Repeat through step-13 while(j>0)

step 12: Print one space

step 13: j=j-1

step 14: Print “*”

step 15: isc=isc+ 1

step 16: osc=osc-1

 step 17: I=i+ 1

step 18: If(row!=1then execute following steps else goto step-23

step 19: Initialize l=1

step 20: Repeat through step-22 while (l<=row)

step 21: Print “*”

step 22:l=l+1

step 23: Exit

Here is the Java Example for Right Angled Triangle:

import java.util.*; 
 class RightAngledTriangle 
 { 
                   public static void main(String s[]) 
               { 
                       int i,j,row,isc,osc,var; 
                       i=j=row=osc=var=0; 
                       Scanner read=new Scanner(System.in); 
                       System.out.print("Enter number of Rows : "); 
                       row=read.nextInt(); 
                       System.out.println("\n"); 
                       if(row>0) 
                         { 
                            System.out.print("\t"); 
                            isc=0; 
                            System.out.println("*"); 
                             for(i=2;i<row;i++) 
                                { 
                                  System.out.print("\t"); 
                                  System.out.print("*"); 
                                     for(j=isc;j>0;j--) 
                                          System.out.print(" "); 
                                          System.out.println("*"); 
                                          isc++; 
                                          osc--; 
                                 } 
                                      if(row!=1) 
                                       { 
                                         System.out.print("\t"); 
                                         for(int l=1;l<=row;l++) 
                                         System.out.print("*"); 
                                       } 
                           } 
                                 System.out.println(""); 
                   } 
 }