PYTHON

how to write a while statement in python

myvariable = 10
while myvariable > 0:
  print(myvariable)
  myvariable -= 1

while loop python

while (condition):
  doThis();

while loop in python

j = 0
while j < 3:
  print("hello") # Or whatever you want
  j += 1
#This runs the loop until reaches 3 and above

python while loop

while <condition>:
  <run code here>
  
# for example,
i = 0
while True:
  i += 1
  # i will begin to count up to infinity
while i == -1:
  print("impossible!")

while loop python

i = 1
while i<10:
 print("hello world")
 i+=1
#note the i++ syntax is not valid in python

while loop in python

# while loop runs till the condition becomes false
number = 0
while number > 10:		# prints number till 10
  print(number)
  number += 1
  

python do while loop

# A python equivilant to do-while
n = 0
while True: # Do
  print(n)
  n += 1
  if n%3 == 0: # While
    break
# Output: 0, 1, 2

python while loop

# A while loop is basically a "if" statement that will repeat itself
# It will continue iterating over itself untill the condition is False

python_is_cool = True
first_time = True

while python_is_cool:
	if first_time:
		print("python is cool!")
    else:
      first_time = False
      
print("Done")

# The while loop can be terminated with a "break" statement.
# In such cases, the "else" part is ignored. 
# Hence, a while loop's "else" part runs if no break occurs and the condition is False.
# Example to illustrate the use of else statement with the while loop:
  
counter = 0

while counter < 3:
    print("Inside loop")
    counter = counter + 1
else:
    print("Inside else")

while loop in python

# Program to add natural numbers up to 'n'
# sum = 1+2+3+...+n

n = 10
sum = 0
i = 1

while i <= n:
    sum = sum + i
    i = i+1    # update counter

# print the sum
print("The sum is", sum)

# To take input from the user,
# n = int(input("Enter n: "))

Python while loop

number = 1
while number != 5:	# While statement is true
  # Do this
  print(number)
  number += 1

Python while loop

while (condition):
	print("I keep printing while the condition is True")
else:
	print("I will be written when loop finished. if you use break in loop I won't be executed")

python while loop

while <Condition>:
  <code>
  
  #example
  i = 10
  while i == 10:
    print("Hello World!")

pyton do while loop+

#there is no do while loop in python but you san simulate it
i = 1  
  
while True:  
    print(i)  
    i = i + 1  
    if(i > 5):  
        break  

python while loop

while True:
	print("foo")

python do while loop

while True:
  //do something
  if (""" break condition """):
    break

while loops python

while 10 > 8:
  print("Hello")
while not False:
  print("Hello")
while True:
    print("Hello")

while loop in python

#there are 2 ways to make a while loop in python

#first way -

while True:
  (#what ever you want in the loop)
    
#second way - 
    
while 1:  
    (#what ever you want in the loop)

Python while loop

i = 0
while i < 10:
    print(i)
    i += 1

while loop in python

#Make a variable containing an integer like shown below:
i=1
while i<=6:
  print ("Hello")
#This loop will go on forever and the only way to stop it is to kill your program

while python

i=1
total=0
while i<=5 :
    num = int(input("Pls enter number </> :"))
    total=total+num
    i+=1
ave=total/5
print (ave)

python do while loop

i = 1

while True:
    print(i)
    i = i + 1
    if(i > 3):
        break

Example code of while loop in python

total = 0
num = int(input("Enter the number: "))
while num != 7:
    total = total+num
    num = int(input("Enter the number: "))
print("Sum: ", total)

python while loop

# while True loop
while True:
	print("This will continue to print this forever")
    
# while variable loop
value = 5
while value = 5:
	# Since this is true, this will continue on forever
    print("Yes")

python while loop

# a 'while' loop runs until the condition is broken
a = "apple"
while a == "apple":
  a = "banana" # breaks loop as 'a' no longer equals 'apple'
  
# a 'for' loop runs for the given number of iterations...
for i in range(10):
  print(i) # will print 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

# ... or through a sequence
array = [3, 6, 8, 2, 1]
for number in array:
  print(number) # will print 3, 6, 8, 2, 1

python while loop

i = 1
while i<=4:
    print(i)
    i=i+1
print("Done")
i= 1
while i<=5:
    print("@"*i)
    i=i+1
print("Done")

while loop python

# while loop (python)
i = 0 

while i < 10:
  	i +=1 #or i = i + 1 
    print(i)

python while loop

x = 0

while x < 5:	# This is the loop condition, the loop will repeat WHILE thid condition is true
	print(x)
    x += 1
	if x == 3:
    	break	# This break statment will end the loop no matter what

while loop python

# While loop counting to 10 in 2's

i = 2

while i <= 10:  # While i is less than or equal 10, it will add 2
  print(i)
  i = i + 2

while loop in python

while True:
  print("Running")
  #<infinite>: "Running" untill you press "ctrl + c" in termenal
  

python while loop

CAN_loop = True
thenumber = 0
from time import sleep, time

while CAN_loop:
    #put your code in here. for example i do this. you can delete the code
    
    
    print(Number)
    Number = Number + 1
    sleep(1)
    if thenumber == 10:
        CAN_loop = False
        print("we are gonna stop counting")

python while loop

# the below game will help you see how you can use while in Python

# we can use the random number generator 
from random import randint

# docstring: https://peps.python.org/pep-0257/
logo = '''
❓❓❓ WELCOME TO GUESS THE NUMBER ❓❓❓
'''
# display logo
print(logo)

# randomly generate a number
answer_num = randint(1, 100)
print(answer_num)
 
# number of turns, start at 0
num_of_turns = 0

# game difficulty
game_level = input('Choose game difficulty - type "easy" or "hard": ').lower()

# check what the user chose
# user chose easy - num_of_turns will be assigned the value of 5
if game_level == 'easy':
    num_of_turns = 5
# user chose easy - num_of_turns will be assigned the value of 3
elif game_level == 'hard':
    num_of_turns = 3
# user typed something random - num_of_turns is not updated, stays 0
else:
    print('invalid entry.')
    

# continue guess (flag): this will make it possible for us to get out of the loop
continue_guess = True

while continue_guess == True:
    
    if num_of_turns < 1:
        print('goodbye!')
        continue_guess = False
    else: 
        #  user guess 
        guess_number = int(input('guess a number between 1 and 100: '))
        
        if guess_number > answer_num:
            num_of_turns -= 1
            print(f'guess too high! | {num_of_turns} turns remaining.')
        elif guess_number < answer_num:
            num_of_turns -= 1
            print(f'guess too low! | {num_of_turns} turns remaining.')
        elif guess_number == answer_num:
          	# user won, get out of the loop
            print(f'You guessed it right! | correct guess: {guess_number}')
            # update your flag from True to False to get out of the loop
            continue_guess = False
        else:
          	# user typed something random, get out of the loop
            print('invalid entry!')
            continue_guess = False
            

python while loop

# the below game will help you see how you can use while in Python

# we can use the random number generator 
from random import randint

# docstring: https://peps.python.org/pep-0257/
logo = '''
❓❓❓ WELCOME TO GUESS THE NUMBER ❓❓❓
'''
# display logo
print(logo)

# randomly generate a number
answer_num = randint(1, 100)
print(answer_num)
 
# number of turns, start at 0
num_of_turns = 0

# game difficulty
game_level = input('Choose game difficulty - type "easy" or "hard": ').lower()

# check what the user chose
# user chose easy - num_of_turns will be assigned the value of 5
if game_level == 'easy':
    num_of_turns = 5
# user chose easy - num_of_turns will be assigned the value of 3
elif game_level == 'hard':
    num_of_turns = 3
# user typed something random - num_of_turns is not updated, stays 0
else:
    print('invalid entry.')
    

# continue guess (flag): this will make it possible for us to get out of the loop
continue_guess = True

while continue_guess == True:
    
    if num_of_turns < 1:
        print('goodbye!')
        continue_guess = False
    else: 
        #  user guess 
        guess_number = int(input('guess a number between 1 and 100: '))
        
        if guess_number > answer_num:
            num_of_turns -= 1
            print(f'guess too high! | {num_of_turns} turns remaining.')
        elif guess_number < answer_num:
            num_of_turns -= 1
            print(f'guess too low! | {num_of_turns} turns remaining.')
        elif guess_number == answer_num:
          	# user won, get out of the loop
            print(f'You guessed it right! | correct guess: {guess_number}')
            # update your flag from True to False to get out of the loop
            continue_guess = False
        else:
          	# user typed something random, get out of the loop
            print('invalid entry!')
            continue_guess = False
            

Python while loop

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while loops python

# There are 2 types of loops in python
# while loops and for loops
# a while loops continues for an indefinite amount of time
# until a condition is met:

x = 0
y = 3
while x < y:
    print(x)
    x = x + 1

>>> 0
>>> 1
>>> 2

# The number of iterations (loops) that the while loop above
# performs is dependent on the value of y and can therefore change

######################################################################

# below is the equivalent for loop:
for i in range(0, 3):
    print(i)

>>> 0
>>> 1
>>> 2

# The for loop above is a definite loop which means that it will always
# loop three times (because of the range I have set)
# notice that the loop begins at 0 and goes up to one less than 3.

python while loop

while True:
    pass

what are while loops in python

myvariable = 10
while myvariable > 0:
  print(myvariable)
  myvariable -= 1
  

Python while Loop

# Program to add natural
# numbers up to 
# sum = 1+2+3+...+n

# To take input from the user,
# n = int(input("Enter n: "))

n = 10

# initialize sum and counter
sum = 0
i = 1

while i <= n:
    sum = sum + i
    i = i+1    # update counter

# print the sum
print("The sum is", sum)

while loop in python

#Multiples of three 

i = 0
while True:
    print(i)
    i = i + 3
    if(i > 30):
        break
#output will be:
0 #First it will count i=0, starts from zero and for example if you put i=1,it will start from 1.
3 #Here i=0, i=0+3, so i=3 and i becomes 3 for next value. so on
6 #i=3
9 #i=6
12 #so on
15
18
21
24
27
30

python while loop

current_value = 1
while current_value <= 5:
	print(current_value)
	current_value += 1

while loop in python

# It is very important to understand the logic behind the While loop
n = 3
while n>0:
    print(n)
    n = n - 1 # This can also write as (n -= 1)
print('Blastoff')
# Remember when the n=0, it does not run 
# it comes out of the while loop but the value remains in the variable
print(n)

python easy while loop

countdown = 10
while countdown >= 0:
  print(countdown)
  countdown -= 1
print("We have liftoff!")

for loop to while loop in python

for i in range(1"""start""",10"""end""",2"""steps"""):
  print(i)
  
i = 1 """start"""
while i<10"""end""":
  print(i)
  i+=2"""steps"""

how to do a while loop python

while True: #True can be replaced with a different condition
  #result

do while loop python

# do while sample loop in python
# do statements in try while number is < 0
i = 0
number = -1
while number < 0:
    try:
        number = int(input("Enter a number: "))
        print(number)
        i += 1
    except ValueError:
        print("Invalid input")