input: Write a function to generate and print a Pascal triangle for a given number of rows. If the input number of rows is 0, the function should print nothing.
  def PascalTriangle(n) : 
        
      # An auxiliary array to store 
      # generated pscal triangle values 
      arr = [0 for i in range(n)] 
        
      # Iterate through every line and 
      # print integer(s) in it 
      for line in range(0, n) : 
            
          # Every line has number of  
          # integers equal to line  
          # number 
          for i in range (0, line + 1) : 
                
              # First and last values  
              # in every row are 1 
              if (i == 0 or i == line) : 
                  arr[i] = 1
                    
              # Other values are sum of  
              # values just above and  
              # left of above 
              else : 
                  arr[i] = arr[i] + arr[i - 1]  
                
          # Printing array in 
          # mantainence of order          
          for i in range (0, line + 1) : 
              print(arr[i], end =" ")  
          print()   
    
  assert PascalTriangle(0) == None
  assert PascalTriangle(1) == None
  assert PascalTriangle(5) == None
output: def PascalTriangle(n): 
      arr = [0 for i in range(n)] 
      for line in range(0, n): 
          for i in range (0, line + 1): 
              if (i == 0 or i == line): 
                  arr[i] = 1
              else: 
                  arr[i] = arr[i] + arr[i - 1] 
          for i in range (0, line + 1): 
              print(arr[i], end =" ") 
          print()