Upper Right Triangle | Write a program in java to print and upper right triangle. | ISC Computer Science | ICSE Computer Application
Algorithm
- Start
- n:=0
- Print "Enter a number"
- Read n
- i=0
- If i<n, go to step 7 or else go to step 15
- j=0
- If j<n, go to step 9 or else go to step 13
- If j<i, go to step 10 or else go to step 11
- Print " ". Go to step 12
- Print "*"
- j++. Go to step 8
- Go to next line.
- i++. Go to step 6
- Stop
Program
Buffered Reader
import java.io.*;
class UpperRight
{
int n;
void accept() throws IOException
{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter a number");
n=Integer.parseInt(br.readLine());
}
void display()
{
for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
{
if (j<i)
{
System.out.print(" ");
}
else
{
System.out.print("*");
}
}
System.out.println();
}
}
void main() throws IOException
{
accept();
display();
}
}
Scanner
import java.util.*;
class UpperRight
{
int n;
void accept()
{
Scanner sc=new Scanner(System.in);
System.out.println("Enter a number");
n=sc.nextInt();
}
void display()
{
for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
{
if (j<i)
{
System.out.print(" ");
}
else
{
System.out.print("*");
}
}
System.out.println();
}
}
void main()
{
accept();
display();
}
}
Documentation
Variable Description
Data Type | Variable Name | Description |
int | n | To store the height of the triangle |
int | i | To act as a counter variable |
int | j | To act as a counter variable. |
Method Description
Return Type | Method Name | Description |
void | accept() | To accept data from the user |
void | display() | To display an upper right triangle |
void | main() | To act as an entry gateway for the compiler. |
Output
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