python-basics

• Python can distinguish among data types such as integers, floats, strings, and Booleans.

• Integers are whole numbers that can be positive or negative.

• Floats include integers as well as decimal numbers between the integers.

• You can convert integers to floats using typecasting, but you cannot convert a float to an integer.

• You can convert integers and floats to strings.

• You can convert an integer or float value to True (1) or False (0).

• Expressions in Python are a combination of values and operations used to produce a single result.

• Expressions perform mathematical operations such as addition, subtraction, multiplication, and so on.

• We use”//” to round off integer divisions, resulting in float values.

• Python follows the order of operations (BODMASS) to perform operations with multiple expressions.

• Variables store and manipulate data, allowing you to access and modify values throughout your code.

• The assignment operator ”=” assigns a value to a variable.

• ”:” denotes the value of the variable within the code.

• Assigning another value to the same variable overrides the previous value of that variable.

• You can perform mathematical operations on variables using the same or different variables.

• While performing operations with various variables, modifying a value in one variable will lead to changes in the other variables.

• Python string operations involve manipulating text data using tasks such as indexing, concatenation, slicing, and formatting.

• A string is usually written within double quotes or single quotes, including letters, white space, digits, or special characters.

• A string attaches to another variable and is an ordered sequence of characters.

• Characters in a string identify their index numbers, which can be positive or negative.

• We use strings as a sequence to perform sequence operations.

You can input a stride value to perform slicing while operating on a string.

Operations like finding the length of the string, combining, concatenating, and replicating, result in a new string.

You cannot modify an existing string; they are immutable.

You can perform escape sequences using ” ” to change the layout of the string.

In Python, you perform tasks such as searching, modifying, and formatting text data with its pre-built string methods functions.

You apply a method to a string to change its value, resulting in another string.

You can perform actions such as changing the case of characters in a string, replacing items in a string, finding items in a string, and so on using pre-built string methods.