num_rows = int(input("Enter the number of rows: "));
k = 1
for i in range(0, num_rows):
    for j in range(0, k):
        print("* ", end="")
    k = k + 1
    print()
     
           
Note: Need to be arranged in compiler after copied
   

 OutPut:

Enter the number of rows: 5
*
* *
* * *
* * * *
* * * * *