Understanding Loops
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| loop in python |
Whenever you see a repetitive pattern in code, and there's a collection
Types of Loops
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| types of loop in python |
There are mainly two types of loops in Python:
- for loops: Commonly used with lists and used when the repetition count is known.
- while loops: Commonly used when repetition is based on a condition and we don't know the exact repetition count.
of items, it's a clear sign that a "for loop" could be used to simplify the
task. Let's understand the syntax of "for" loop.
syntax : for item in list_of_items:
for loop :
- LOOP THROUGH A LIST
example code :
fruits = ['apple', 'banana', 'cherry']
for fruit in fruits:
print(fruit)
Output :
apple
banana
cherry
- USING range() WITH for LOOP :
for i in range(5):
print(i)
Output :
0
1
2
3
4
- LOOP THROUGH A STRING :
for char in "python":
print(char)
Output :
p
y
t
h
o
n
- LOOP WITH break AND continue :
#break
for num in range(10):
if num==5:
break
print(num)
Output :
0
1
2
3
4
#continue
for num in range(10):
if num == 5:
continue
print(num)
Output:
0
1
2
3
4
6
7
8
9
LOOP WITH else block
for i in range(3):
print("Looping",i)
else:
print("Loop finishing")
Output:
Looping 0
Looping 1
Looping 2
Loop finishing
while loop :
while condition:
#code to execute
break to exit
i = 0
while i < 5:
print(i)
i += 1
Output
0
1
2
3
4
continue to skip irretation
i = 0
while True:
print(i)
i += 1
if i == 3:
break
Output:
0
1
2
i = 0
while i < 5:
i += 1
if i == 3:
continue
print(i)
Output:
1
2
4
5
while loop with else
i = 1
while i <= 3:
print(i)
i += 1
else:
print("Loop completed!")
Output:
1
2
3
Loop completed!
- You have to must try in your python compiler use idle avoid online compilers to Errors
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