A function that returns Pascal's Triangle with n rows:
//import necessary headers
public class Pascal_Triangle {
// calculate factorial
static int factorial(int n)
{
int fact = 1;
int i;
for(i=1; i<n; i++)
{
fact*=i;
}
return i;
}
// Actual code to display the //pascal triangle
static void display(int n)
{
int i;
int line;
for(line=1;line<=n;line++)
{
for(i=0;i<=line;i++)
{
System.out.print((factorial(line)/factorial(line-i) * factorial(i)) + " ");
}
System.out.println();
}
}
// To read user input
public static void main(String[] args){
BufferedReader breader=new BufferedReader(new InputStreamReader(System.in));
int n;
System.out.println("Enter the size for creating Pascal triangle");
try {
n = Integer.parseInt(breader.readLine());
}
catch(Exception e){
System.out.println("Please enter a valid Input");
return;
}
System.out.println("The Pascal's Triangle is");
display(n);
}
}
