How to Perform Iterations Based on Conditions in Python
In programming, a loop is used to perform the same task multiple times.
Loops iterate over a series of items, such as lists, tuples, or strings, performing the same task for each item.
These lists, tuples, and strings are called sequences, and each item in a sequenceis known as an element.
Structure of a for Loop
A for loop starts with the for keyword and specifies a variable that represents each item in the sequence to be iterated over as follows:
python title="Structure of a for Loop"
for element in sequence:
code_to_repeat
Each item in the sequence is assigned to the variable element one by one, and the code_to_repeat is executed each time.
In a for loop, a colon (:) must be placed after the loop statement, and the code_to_repeat must be indented.
The following for loop example assigns each element of the numbers list, a sequence of numbers, to the n variable in turn and prints n.
python title="for Loop Example"
numbers = [1, 2, 3, 4, 5]
# Assign each element of the numbers list to the variable n in turn
for n in numbers:
print(n) # Print the variable n
# 1, 2, 3, 4, 5 will be printed on separate lines
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