Python Tutorial for Beginners 12 - While Loop and For Loops in Python

In this video I am going to show How to use while Loop in Python.
while loop is used to repeat over block of code again and again until is condition is met. The while loop can be used to describe conditional iteration.While loops read a lot like English (like almost everything in Python).
while condition :
list of statements
Note the colon and indentation.
When a program repeatedly runs a set of statements it is referred to as a loop.
Also else statement can be used with while loop.
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[md.shorifulislam]

Dear PK, would you explain these two line of statements below again ?
a = float(input('Number ?'))
a = float(a))

[ayushshaw]

The syntax of the for loop part should have been given along with the example since u used the in operator too

[GeorgeSariev]

atention for linux use space in terminal
>>> while a<5:
...  print(a)
...  a+=1

...enter

[ajithmoharana]

no=5
while no<=10:
no2=1
while no2<=10:
print(no, " X ", no2, " = ", no*no2)
no2+=1
no=no+1

[ankitmakkar]

for loop is not explained in detail like incrementing in steps of 1 & more than 1 or decrementing loop

[md.shorifulislam]

Dear PK, if I want to stop the total Sum by writing 100 instead of 1, what should I to do ?

[stusmith]

Hi,
Maybe I missed it but why do you have the "a = float (a)" line ?? What purpose does it serve ?

Steve

[robin]

How to store the printed output directly into a list, for e.g : [0, 1, 2,3,4,]??

[mixturemind]

I dont think..we have to write multiple line to execute simple program.. here is my code.. output is same ;)

a=1
s=0
while a!=0:

print("current sum is:", s)
a= float(input("enter number:"))
#a=float(a)
s=s+a
print("total sum is:", s)

else:
print("invalid option")

[eduardczuwak]

Is it necesary have line "a=float(a)"?

[rajatrp]

please clarify
if a= float('input') //input is taken in float format
float (a) //converting again float

does it makes any sense

[tasnianishat]

why does this code(the while loop code) run in windows cmd but not in IDLE??

[bishnushrestha]

how it is possible that the assigned value of a=1 that 1 is not mentioned on a=float(a)

[sreddy]

In a new shell
>>> a=0
>>>While a<5:

Immediately, I see "SyntaxError : invalid syntax".

Why is this?

[imeyris]

if i can do a+=1, can I do a*=(some number)?

[bishnushrestha]

why it is necessary to assign the value of a??

[prahaladt]

How can we print all no. In single line in case of while loop?

[SaranyaSaranya-ujum]

Hi sir.. in 8.53 mins, why shouldn't use double quotes... print(num) this only write? Usually if u print option we use double quotes na

[haithamalnasrawi]

What is the benifit of a=float(a) here?

[minimalist_pc]

Sir... in the while loop code why did you a=float (a)
in the previous step you have already type casted the value into float and then assigned to' a'. Then why did you use 'a=float(a)' again?? Please explain. :)