Python For Loops
Python Tutorial » Python For Loops
for loops are used when you have a block of code which you want to repeat a fixed number of times or is used to iterate over a sequence as: list, tuple, string or other iterable objects.
Loop continues until we reach the last item in the sequence.
Example: of "if" statement
Output:
The sum of my_numbers is 32
# Find the sum of all 7 numbers stored in my_numbers list
# List of numbers
my_numbers = [3, 4, 1, 6, 11, 2, 5]
# variable to store the sum
sum = 0
# iterate over the list
for val in my_numbers:
sum = sum+val
Output:
The sum of my_numbers is 32
range() Function - example
The range() function returns a sequence of numbers increments by 1 (as default)
Example: Using the range() function:
We go on time 2
We go on time 3
We go on time 4
We go on time 5
for y in range(2, 6):
print("We goon time %d" % (y))
Output: print("We goon time %d" % (y))
We go on time 2
We go on time 3
We go on time 4
We go on time 5
for loop with else - example
A for loop can have an optional else block as well.
Example:
print(i)
else:
print("Not element left.")
Output:
0
3
4
7
12
Not element left.
digits = [0, 3, 4, 7, 12]
for i in digits:print(i)
else:
print("Not element left.")
0
3
4
7
12
Not element left.
continue Statement
continue statement stop current iteration of the loop
Example: continue statement
John
Chris
Ann
names = ["John", "Tom", "Chris", "Ann"]
for x in names:
if x == "Tom":
continue
print(x)
Output:for x in names:
if x == "Tom":
continue
print(x)
John
Chris
Ann
Python for loop: index, break, range, list, continue, one line, dictionary , reverse, array, example
Python For Loops - python
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