Pattern20

C Program

#include <stdio.h>
#include <stdlib.h>
int main()
{
    int numbers,i,j,c=1;
    printf("Enter the Number of rows:");
    scanf("%d",&numbers);
    for(i =1 ; i<=numbers; i++)
     {
       for(j=0; j<i; j++)
       {
         printf("%d ",c);
         c++;
       }
        printf("\n");
     }
}

Java Program

import java.util.Scanner;

public class Pattern_20 {

	public static void main(String[] args) {
		Scanner S = new Scanner(System.in);
		System.out.print("Enter no of rows:");
		int n = S.nextInt();
		int c =1;
		for(int i =1;i<=n;i++)
		{
			for(int j=0;j<i;j++)
			{
				System.out.print(c+" ");
				c++;
			}
			System.out.print("\n");
		}
	}
}

Python Program

n = int(input("Enter numbe of rows: "))
k=1
for i in range(n):
    for j in range(i+1):
            print(k, end=" ")
            k=k+1
    print(" ")