WEBVTT 00:00.000 --> 00:15.480 Hi, friends. In this video, we are going to discuss about why we need Python. Python is 00:15.480 --> 00:22.440 a powerful programming language. Let's learn why do we need Python and its applications. 00:22.440 --> 00:27.560 One thing is dynamic typed language. Let us discuss it with an example. Consider this 00:27.560 --> 00:33.880 code in C programming language. We have integer variable, I declared and initialized to 10. Then 00:33.880 --> 00:39.320 we are setting I to hello, which is a string. Then we are setting I to a float value, but 00:39.320 --> 00:47.240 is that possible? No. I is an integer type variable, so it can only accept integer values. 00:47.240 --> 00:53.840 That is in C, as well as in C++. The type of the variable is verified at compile time. 00:53.840 --> 00:59.520 So once we define the type, it won't accept other data type values, but Python has dynamically 00:59.520 --> 01:05.320 typed language and type checking happens at runtime. So we can assign any and all kind 01:05.320 --> 01:09.960 of data to a variable, it will be handled efficiently at runtime, which makes it very easy 01:09.960 --> 01:16.640 to program. Next is user friendly syntax of Python. In C, if we want to print a message, 01:16.640 --> 01:21.680 we should include the header file, main function, and semicolon at the end of every statement. 01:21.680 --> 01:26.480 But in Python, we can simply do it with a single print function. This makes anyone can easily 01:26.480 --> 01:32.320 learn Python. Next is the readability of Python. If we write this unindented C code, it will 01:32.320 --> 01:37.440 still run and produce output, even though it is not readable. But in Python, if we write 01:37.440 --> 01:42.720 without indentation, it won't run. By default, Python enforces readability. If we want 01:42.720 --> 01:47.560 to run the program, we should align it with proper indentation like this. Hence Python 01:47.560 --> 01:52.920 codes are readable in nature, which makes it easy to maintain it. Next is Python increases 01:52.920 --> 01:57.760 developer productivity. In C, if you want to check whether a number exists in an array or 01:57.760 --> 02:03.920 not, we need to write this code or other equally long codes. But in Python, we can achieve it 02:03.920 --> 02:09.360 in very few lines like this. So developers can easily develop a large software, and this 02:09.360 --> 02:14.760 is how Python increases productivity, and Python has a lot of supporting libraries. All 02:14.760 --> 02:19.120 the above characteristics make Python a perfect language for scripting and rapid application 02:19.120 --> 02:24.560 development. Now, what all can we do with Python? It can be used to develop a graphical 02:24.560 --> 02:30.480 user interface. It can be used in web development, in scripting, in image processing, in machine 02:30.480 --> 02:36.320 learning, et cetera. So what is the drawback of Python? Execution speed is lower compared 02:36.320 --> 02:42.240 to C, and C plus plus C is a low-level programming language, so it will directly communicate 02:42.240 --> 02:48.080 with the hardware. Hence, its execution speed is high. Python code will not directly communicate 02:48.080 --> 02:52.960 with the hardware. It is intermittently processed, and then it will be converted into low-level 02:52.960 --> 02:57.960 language, and it will communicate with the hardware. So, the execution speed of Python 02:57.960 --> 03:03.320 is very low compared to C and C plus plus. So today, we have learned why we need Python 03:03.320 --> 03:08.800 programming language. We discussed the major benefits of using Python. It has dynamic-typed 03:08.800 --> 03:15.280 language, user-friendly syntax, its readability, and its increased developer productivity. Then 03:15.280 --> 03:20.520 we discussed the dual abilities of Python, and the big companies that use Python language, 03:20.520 --> 03:26.600 and finally the drawback of Python, which is the lower execution speed. So that's all, 03:26.600 --> 03:28.080 and thank you for watching this video.