Answer to Question #217262 in Python for sai

Question

Trapezium Order

You are given an integer

N. Print N rows starting from 1 in the trapezium order as shown in the output of the below examples.Input

The input contains an integer

N.Output

The output should have

N lines. Each of the N lines should have space-separated integers as per the trapezium order.

      

Answer 1

num = int(input("Number of lines: "))
lterm = 1
rterm = num * num + 1
  
for i in range(num, -1, -1):
        
    for space in range(num, i-1, -1):
        print(" ", end ="")
  
    for j in range(1, i + 1): 
        print(str(lterm)+" ", end ="")
        lterm += 1
 
    for j in range(1, i + 1): 
        print(rterm, end ="")
        if j < i:
            print(" ", end ="")
        rterm += 1
        
    rterm = rterm - (i - 1) * 2 - 1 
    print()

Example:

Sample input:
Number of lines: 4

Sample output:
 1 2 3 4 17 18 19 20
  5 6 7 14 15 16
   8 9 12 13
    10 11