In this shot, we will discuss how to generate a hollow square pattern using alphabets in Python.

Tons of patterns can be printed with Python once you have a strong grip over loops. Here, we will use simple `for loops` to generate a hollow square pattern using alphabets.

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## Description

A **square** is a plane figure that consists of $4$ sides that are identical in terms of magnitude. A square has $4$ angles, all of which are $90$ degrees.

To generate a hollow square, we will use $2$ `for` loops:
* Outer loop: Loops through the number of rows.
* Inner loop: Prints the patterns along with the columns.

## Code
Let us take a look at the code snippet.
 


# No of rows
n = 5

# Loop through rows
for i in range(1,n+1):
    
    
    # Loop to print pattern
    for j in range(1,n+1):
        ch = chr(64+i)
        # Printing Pattern
        if (i==1 or i==n or j==1 or j==n):
            print(ch, end = " ")
        else :
            print(" ", end = " ")
    print()



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## Explanation

* Line 2: We take the input for the number of rows (i.e. the length of the square).

* Line 5: We create a `for` loop to iterate through the number of rows.

* Line 9: We create an inner nested `for` loop that runs along with the columns. 

* Line 10: We define `ch`, which is used to create alphabets from numbers by using the iterative value of `i` and the concept of ASCII conversion. The starting value $64 + (i=1)$, which is used as an ASCII value of `A` (the start of the square), is $65$.

* Lines 12 to 15: We provide conditional statements that print the given pattern.
  * `i==1` ⇒ Prints the upper side.
  * `i==n` ⇒ Prints the lower side.
  * `j==1` ⇒ Prints the left side.
  * `j==n` ⇒ Prints the right side.
  * The `end` statement helps to stay on the same line.

* Line 16: We use the `print()` statement to move to the next line.


How to generate a hollow square pattern using alphabets in Python

Generating a hollow square pattern with alphabets in Python involves using nested loops and ASCII conversion.