INFINITE LOOPS
=============
LOOP/ITERATION
	WHEN  A BLOCK OF STATEMENTS WANT TO EXECUTE AGAIAN AND AGAIN BASED ON CONDITION 
	WHILE LOOP, FOR LOOP
	NESTED LOOPS

INFINITE LOOPS ==> ALLOW TO MAKE EXECUTE THE BLOCK OF CODE FOR INFINTE NUMBER OF TIMES.
REASONS:
	1) WHEN  THE GIVEN CONDITION IS INCORRECT.
	2) WHEN THE UPDATE IS INCORRECT
	3) WHEN TH UPDATE STATEMENT IS MISSING

i = 1

while i <= 10:
    print("Hello World!")
    # i += 1	missing of update statement

======================================

i = 1

while i > 0:    # when the condition is incorrect
    print("Hello World!")
    i += 1

==============================

i = 1

while i <= 10:    # when the condition is incorrect
    print("Hello World!")
    i -= 1

==> to make interrupt an infinite loop execution,
	keyboard interrupt ==> Ctrl + c

Applications
==========
1) client-server model
ex: 
	smart phone with sim
		network start
			calling
			texting
			browsing etc.
2) gaming development
cricket ==>
	common shots

==========================================

Transfer Statements
================
==> also called as "loop controlling statements"
==> when we want stop/terminate the execution of loop body immediately.
==> when we want to skip some iteration and continue with remaining.
==> two types:
	1) break statement
	2) continue statement

Note:
====
No goto statement in python.

1) break statement
===============
here:
	break ===> keyword 
==> to stop/terminate the loop body statements execution immediately.
Syntax:
	break
==> we can allowed to use the break in only loops
	along with condition

for i in range(20, 0, -1):  # reverse accessing
    if i == 10:
        break
    print(i,end = "\t")

=========================

i = 20
while i > 0:
    if i == 10:
        break
    print(i,end = "\t")
    i -= 1

==============================

for i in range(1,10):
    print(i, end="\t")
    break

============================
2) continue statement
=================
here:
	continue ===> keyword
==> when we want to pause/skip some iteration and continue with remaining iterations, continue statement is used.
Syntax:
	continue
==> we can always use this continue statement in loops only.

for i in range(1,11):
    if i == 6:
        continue
    print(i, end="\t")
=====================

i = 10
while i > 0:
    if i == 6:
        i -= 1
        continue
    print(i,end = "\t")
    i -= 1

==> continue with condition in loops ==> suggested
	because, if the condition is missing with continue 
		the loop will be executed as like normal loop.

================================================

patterns
======
==> requirement: nested loops
outerloop:
	innerloop:

lines = int(input("Enter number of lines for pyramid structure:")) # 6

# row-wise operation

for row in range(1,lines+1):
    # column-wise operation
    for col in range(1,row+1):
        print("*",end = "  ")
    print()

==============================

lines = int(input("Enter number of lines for pyramid structure:")) # 6

# row-wise operation

for row in range(1,lines+1):
    # column-wise operation
    for col in range(1,row+1):
        print(row,end = "  ")
    print()

====================

lines = int(input("Enter number of lines for pyramid structure:")) # 6

# row-wise operation

for row in range(1,lines+1):
    # column-wise operation
    for col in range(1,row+1):
        print(col,end = "  ")
    print()

===============================

chr()
====
==> accept an ASCII value
==> return: its corresponding character
Syntax:
	chr(ASCII Value)

ord()
====
==> accept a character
==> return its corresponding ASCII
Syntax:
	ord(character)

lines = int(input("Enter number of lines for pyramid structure:")) # 6

value = 97  # starting point of upper case alphabet ASCII

for row in range(1,lines+1):
    for col in range(1,row+1):
        result = chr(value)
        print(result,end = "\t")
    value += 1
    print()

==============================

symbol

if symbol == '+':
	a + b
elif symbol == '-':
	a - b
else:
	incorrect operation