while loopWhile loops, like the For loops, are used for repeating specific block of codes.. The "while" loop is capable of anything that the "for" loop can do.. But unlike a for loop, th
Trang 1while loop
While loops, like the For loops, are used for repeating specific block of codes The "while" loop is capable of anything that the "for" loop can do But unlike a for loop, the while loop will not run n times, but until a defined condition is no longer met
If the condition is initially false, the loop body will not be executed at all
The syntax of this loop is:
while (condition):
statement_1
statement_2
statement_n
Let's make our examples;
In [1]: count = 0
while (count < 10):
print ('The count is:',count) count += 1
print("It's done!")
In [2]: a = 1
while (a < 10):
print (a) a+= 2
The count is: 0
The count is: 1
The count is: 2
The count is: 3
The count is: 4
The count is: 5
The count is: 6
The count is: 7
The count is: 8
The count is: 9
It's done!
1
3
5
7
9
The Complete Python 3 Programming Course: (Beginner to Advanced)
Trang 2In [3]: 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)
In [5]: i=0
text="Python is great!"
while i<len(text):
print(text[i],text) i+=1
Infinite Loop
Since we don't increase i variable, it will become an infinite loop Please do not run this code!
In [ ]: i=0
while (i<15):
print(i)
This is the end of this lesson
See you in our next lessons
In [ ]:
The sum is 55
P Python is great!
y Python is great!
t Python is great!
h Python is great!
o Python is great!
n Python is great!
Python is great!
i Python is great!
s Python is great!
Python is great!
g Python is great!
r Python is great!
e Python is great!
a Python is great!
t Python is great!
! Python is great!
The Complete Python 3 Programming Course: (Beginner to Advanced)