Lecture 40:- For Loop In Python

In Python, a for loop is used to iterate over a sequence of elements. It allows you to execute a block of code for each item in the sequence. The for loop in Python is versatile and can be used with various types of sequences, including lists, tuples, strings, dictionaries, and even with the range() function.

The general syntax of a for loop in Python is as follows:

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for item in sequence:    # Code block to execute for each item

Here's how a for loop is typically used:

Example 1: Looping over a list:

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fruits = ["apple", "banana", "orange"] for fruit in fruits:    print(fruit)

Output:

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apple banana orange

Example 2: Looping over a string:

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text = "Python" for char in text:    print(char)

Output:

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P y t h o n

Example 3: Looping using the range() function:

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for num in range(1, 6):    print(num)

Output:

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1 2 3 4 5

In the first example, the for loop iterates over the list fruits, and in each iteration, the variable fruit takes the value of each element in the list, and the corresponding code block is executed.

In the second example, the for loop iterates over the string text, and in each iteration, the variable char takes the value of each character in the string, and the corresponding code block is executed.

In the third example, the for loop iterates over the sequence of numbers generated by the range() function, and in each iteration, the variable num takes the value of each number in the sequence, and the corresponding code block is executed.

The for loop is a powerful construct in Python and is widely used to perform tasks that require iterating over a collection of elements or performing a certain action a specific number of times.