Pyramid number pattern in python

Pyramid Number Pattern

Print the following pattern for the given number of rows.

Problem Description: You are given with an input number N, then you have to print the given
pattern corresponding to that number N.
For example if N=4
Pattern output : 1
 212
 32123
 4321234
How to approach?
1. Take N as input from the user.
2. Figure out the number of rows, (which is N here) and run a loop for that.
3. Now, figure out how many columns have to be printed in ith row. On careful observation,
first we have to print spaces and then run a loop upto i columns to print the decreasing
sequence for each row and then run a loop for the increasing sequence.
4. Now, figure out “What to print?” in a particular (row, column). Here we have to print
numbers in increasing order first and then numbers in decreasing order.
Pseudo code for the given problem:
input=N
i=1
For i =1 to i less than or equal to N:
 space=N-i
 While space is less than or equal to 0:
 Print(“spaces”)
 Decrement space by 1
 value=i
 While value is greater than 0:
 Print(value)
 Decrement value by 1
 value=value+2
 While value is less than or equal to i:
 Print(value)
 Increment value by 1
Let us dry run the Code for N=4
● i=1(<=4)
➔ Print 3(4-1) spaces first.
➔ value=1 (>0), so print 1.
➔ value=0, so move out of this inner loop.
➔ value=2(>i), move out of this inner loop
● i=2(<=4)
➔ Print 2(4-2) spaces first.
➔ value=2 (>0), so print 2.
➔ value = 1(>0), so print 1.
➔ value =0, so move out of this inner loop.
➔ value=2 (<=i), so print 2.
➔ value=3(>i), so move out of this inner loop.
● i=3(<=4)
➔ Print 1(4-3) space first.
➔ value=3(>0), so print 3.
➔ value=2(>0), so print 2.
➔ value=1(>0), so print 1.
➔ value =0, so move out of this inner loop.
➔ value=2 (<=i), so print 2.
➔ value=3 (<=i), so print 3.
➔ value =4(>i), so move out of this inner loop.
● i=4(<=4)
➔ Print 0(4-4) space first.
➔ value=4(>0), sp print 4.
➔ value=3(>0), so print 3.
➔ value=2(>0), so print 2.
➔ value=1(>0), so print 1.
➔ value =0, so move out of this inner loop.
➔ value=2 (<=i), so print 2.
➔ value=3 (<=i), so print 3.
➔ value =4(<=i), so print 4.
➔ value=5(>i), so move out of this inner loop.
● i=5(>4), move out of the loop
So, final output:
 1
 212
 32123
 4321234


Pattern for N = 4
   1
  212
 32123
4321234

Input format : N (Total no. of rows)

Output format : Pattern in N lines


Sample Input :
5

CODE:

## Read input as specified in the question.
## Print output as specified in the question.
n = int(input())
i = 1
while i <= n:
    spaces = 1
    while spaces <= n-i:
        print(" ", end = '')
        spaces = spaces + 1
    dec_num = i
    while dec_num > 0:
        print(dec_num, end = '')
        dec_num = dec_num - 1
    inc_num = 2
    while inc_num <= i:
        print(inc_num, end = '')
        inc_num = inc_num + 1
     
    print()
    i = i + 1

Sample Output :
        1
      212
    32123
  4321234
543212345

Console based output: