Python Program to Convert Matrix to String Last Updated : 23 Jul, 2025 Comments Improve Suggest changes 1 Likes Like Report Program converts a 2D matrix (list of lists) into a single string, where all the matrix elements are arranged in row-major order. The elements are separated by spaces or any other delimiter, making it easy to represent matrix data as a string.Using List ComprehensionList comprehension provides a concise way to generate lists by applying an expression to each item in an iterable. It eliminates the need for explicit loops. Python m = [ [1, 2, 3], [4, 5, 6], [7, 8, 9] ] res = ' '.join([str(m[i][j]) for i in range(len(m)) for j in range(len(m[i]))]) print(res) Output1 2 3 4 5 6 7 8 9 Explanationlist comprehension flattens the 2D list m by iterating over each row (i) and each column (j) to access individual elements.join() method combines these elements into a single string, separated by spaces, after converting each element to a string.Using Nested LoopsNested loops iterate through each row and column of the 2D list m, accessing each element individually. The elements are converted to strings and concatenated with spaces to form the final result. Python m = [ [1, 2, 3], [4, 5, 6], [7, 8, 9] ] res = [] for i in range(len(m)): for j in range(len(m[i])): res.append(str(m[i][j])) print(' '.join(res)) Output1 2 3 4 5 6 7 8 9 ExplanationNested loops iterate through each row (i) and each element (j) within that row, appending each element (converted to a string) to the res list.After the loops, the join() method combines all elements of the res list into a single string, separated by spaces.Using itertools.chainitertools.chain flattens the 2D list by chaining all inner lists together into a single iterable. The result is then converted into a string with spaces using join(), after each element is converted to a string. Python import itertools m = [ [1, 2, 3], [4, 5, 6], [7, 8, 9] ] res = ' '.join(map(str, itertools.chain(*m))) print(res) Output1 2 3 4 5 6 7 8 9 Explanationitertools.chain(*m) flattens the 2D list m by chaining all its inner lists into a single iterable.map(str, ...) converts each element into a string, and join() combines them into a single string, separated by spaces. Create Quiz Comment M manjeet_04 Follow 1 Improve M manjeet_04 Follow 1 Improve Article Tags : Python Python Programs Python list-programs Python string-programs Explore Python FundamentalsPython Introduction 2 min read Input and Output in Python 4 min read Python Variables 4 min read Python Operators 4 min read Python Keywords 2 min read Python Data Types 8 min read Conditional Statements in Python 3 min read Loops in Python - For, While and Nested Loops 5 min read Python Functions 5 min read Recursion in Python 4 min read Python Lambda Functions 5 min read Python Data StructuresPython String 5 min read Python Lists 4 min read Python Tuples 4 min read Python Dictionary 3 min read Python Sets 6 min read Python Arrays 7 min read List Comprehension in Python 4 min read Advanced PythonPython OOP Concepts 11 min read Python Exception Handling 5 min read File Handling in Python 4 min read Python Database Tutorial 4 min read Python MongoDB Tutorial 3 min read Python MySQL 9 min read Python Packages 10 min read Python Modules 3 min read Python DSA Libraries 15 min read List of Python GUI Library and Packages 3 min read Data Science with PythonNumPy Tutorial - Python Library 3 min read Pandas Tutorial 4 min read Matplotlib Tutorial 5 min read Python Seaborn Tutorial 3 min read StatsModel Library - Tutorial 3 min read Learning Model Building in Scikit-learn 6 min read TensorFlow Tutorial 2 min read PyTorch Tutorial 6 min read Web Development with PythonFlask Tutorial 8 min read Django Tutorial | Learn Django Framework 7 min read Django ORM - Inserting, Updating & Deleting Data 4 min read Templating With Jinja2 in Flask 6 min read Django Templates 5 min read Build a REST API using Flask - Python 3 min read Building a Simple API with Django REST Framework 3 min read Python PracticePython Quiz 1 min read Python Coding Practice 1 min read Python Interview Questions and Answers 15+ min read Like