Python Data Type Conversion
Python Data Type Conversion: In Python, you can convert one data type to another using type conversion functions. Here are some of the most commonly used type conversion functions: int(x): Converts x to an integer data type. For example, int(“5”) will return the integer value 5. float(x): Converts x to a floating-point data type. For […]
SQL ORDER BY Keyword
SQL ORDER BY Keyword The SQL ORDER BY keyword is used to sort the result set of a SELECT statement in ascending or descending order based on one or more columns. The syntax of the ORDER BY keyword is as follows: SELECT column1, column2, … FROM table_name ORDER BY column1 [ASC|DESC], column2 [ASC|DESC], …; Here, […]
Data types
Data types: Python supports several built-in data types such as integers, floating-point numbers, strings, lists, tuples, and dictionaries. The data type of a variable is determined by the value it holds. Here are some of the most common data types in Python: Integer: Used to represent whole numbers, positive or negative. For example: x = […]
Variables
Variables: In Python, a variable is a name that refers to a value stored in memory. Unlike many other programming languages, you don’t need to specify the data type of a variable in Python. To create a variable in Python, you simply choose a name for the variable and use the equals sign (=) to […]
SQL AND, OR And NOT Operators
SQL AND, OR And NOT Operators In SQL, the AND, OR, and NOT operators are used to combine multiple conditions in the WHERE clause of a SELECT statement to filter data. AND Operator: The AND operator is used to retrieve rows that meet multiple conditions. It returns true if all the conditions specified are true. […]
Comments
Comments Comments: In Python, you can add comments to your code to provide additional information or context for other developers or for yourself in the future. Comments are lines of text that are ignored by the Python interpreter and are intended solely for human readers. There are following ways to add comments in Python: Single-line […]
Java Inner Classes (Nested Classes)
Java Inner Classes (Nested Classes) Java Inner Classes: In Java, an inner class, also known as a nested class, is a class that is defined inside another class. Inner classes provide a way to logically group classes that are only used in one place, while also increasing encapsulation and reducing class clutter. There are four […]
Difference between final, finally and finalize
Difference between final, finally and finalize Difference between final, finally and finalize: final, finally, and finalize are three keywords in Java that are used in different contexts and have different meanings. final: final is a keyword used to define constants, which cannot be modified once they are initialized. A final class cannot be subclassed, a […]
Difference between throw and throws in Java
Difference between throw and throws in Java Difference between throw and throws in Java: The throw and throws keywords in Java are related to exceptions, but they have different uses and meanings. throw is used to explicitly throw an exception in a method or block of code. It is used to indicate that something unexpected […]
React Custom Hooks
React custom hooks are reusable functions that encapsulate common logic and stateful behavior in a declarative way. Custom hooks allow you to extract stateful logic from your components into a reusable function, making your code more modular and easier to maintain. React Custom hooks follow the same rules as other React hooks: they must start […]