Python Variables, Data Types, Operators and Control Structures.

Python is a high-level, interpreted programming language that is extensively used for web development, data analysis, scientific computing, and artificial intelligence. When you first start programming in Python, one of the first things you should understand is the syntax, which covers variables, data types, operators, and control structures.

Variables: -

Variables are used to store data in memory for subsequent usage in the application. In Python, you don't need to declare a variable before using it; instead, use the assignment operator (=) to assign a value to it. As an example:

In the above example, we assigned the variables x, y, and name the values 10, 3.14, and "John," respectively. Python is a dynamically typed language, thus you don't have to define the type of a variable when you declare it. Python will deduce the type automatically based on the value you supply to it.

Data Types: -

In Python, data types such as integers, floating-point numbers, texts, booleans, and more complicated data structures such as lists, tuples, and dictionaries are available. Here are a couple such examples:

In this example, we make variables of various data kinds. The first four variables are simple data types: x is an integer, y is a float, name is a text, and is true is a boolean. More complicated data structures are also created: my list and my list2 are lists, my tuple and my tuple2 are tuples, and my dict is a dictionary.

 A list is an ordered collection of elements that can include items of various data kinds. A tuple is similar to a list, except it is immutable, which means that once created, it cannot be modified. A dictionary is an unordered collection of key-value pairs.

Operators: -

Operators are used to manipulate variables and values. Arithmetic operators, comparison operators, logical operators, and assignment operators are all available. Here are a couple such examples:

In this example, we utilize several operators to manipulate variables and values. The first set of operators includes addition (+), subtraction (-), multiplication (*), division (/), modulo (%), and exponentiation (**).

 

The second set of operators includes equal to (==), not equal to (!=), greater than (>), less than (), greater than or equal to (>=), and less than or equal to (==).

Control Structures: -

Control structures are used to direct the execution of a programme. If/else statements, loops, and functions are examples. Here are a couple such examples:

In this example, we employ several control structures to direct the program's progress. The if statement is the initial control structure, which verifies a condition and runs a block of code if the condition is true. If the condition is false, it can use the elif statement to execute another block of code, or it can use the else statement to execute a default piece of code.

 

 The for loop is the second control structure. It iterates over a series of objects, such as a list or a tuple, and executes a block of code for each item in the sequence.

The while loop is the third control structure, and it executes a block of code repeatedly as long as a condition is true.

The break statement, which is used inside a loop to break out of the loop and stop the iteration when a given condition is fulfilled, is the fourth control structure.

The continue statement, which is used inside a loop to skip an iteration and go on to the next item in the sequence when a given condition is fulfilled, is the fifth control structure.

The try-except statement is the sixth control structure, and it is used to manage mistakes and exceptions in programmes. The code in the try block may throw an exception, and the code in the except block handles the exception. We catch the ZeroDivisionError exception in this example, which occurs when we try to divide an integer by zero.