The Python language offers various loop types to accommodate the looping requirements. In Python, there are numerous ways to run the loops. The For loops is one of those employed for progressive traversal.
For illustration, the for (i=0; in; i++) can be used to iterate through a list, string, or array. For every loop in Python, there is a “for in” loop that is identical to those in other programming languages.
In Python, we may obtain the index by use of:
Use the Index Variable
The placement of any object in a list is represented by the index element. In the following illustration, we use the list of entities to get the index. We iterate through a required string by the use of an iterator attribute.
First, we initialize the variable “d” and assign it the “PLAYGROUND” value. To display the line “List of Indexes and their values:” on the screen, we utilize the print() method. We use a “for” loop to show the list’s indexes. We employ the len() method within this “for” loop. To determine the length of the value of “d,” we use the len() function. This loop iterates until it comes to an end.
Use the Enumerate() Function
This methodology is utilized in the “for” loop to obtain the index and the related value for each item in a list within a range.
Here, we declare a list of the four different fruits. A variable named “d_1” is used to store this list. The statement “The Indices and values are:” is displayed when the print() method is used. We employ the “for” loop and enumerate() function to acquire the indices and values. The print() function is then applied to print the outcome.
Use the List Comprehension Approach
This technique creates a list of the indexes before providing the index and index items.
The names of the countries are listed and kept in the variable “c_name.” The string “Indices” is printed on the screen by the print() method. Following that, we use the list comprehension approach to get the indices. To acquire the length of the required list, we apply the len() function. We employ the print() method once more to display the word “values” on the screen. Now, by using the list comprehension technique, we obtain the data of the indexes. The indices and values are shown by using the print() method.
Use the Zip() Function
We must pass two lists to utilize the zip technique which zips the index and values, simultaneously. There are two lists: one with index values and the other with components.
To start the program, two lists are created. The first one has different integers. The variable “i_list” indicates this list. The second one displays a list of some professions. We declare a variable ‘p_list’ to represent the list of professions. We employ the “for” loop and the zip() function to acquire the indices and values. We provide the two lists as the parameters of the zip function. In the end, the print() method is applied to show the index and values.
Conclusion
This article summarizes the four Python ways to obtain the index. We execute many programs related to such procedures. To obtain the index in Python, we use the index variable in the first example, enumerate() function in the second instance, list comprehension in the third scenario, and the zip() technique in the last illustration. The codes of this article are implemented on the Spdyer software.
