Explanation: A data type in programming specifies the type of value a variable can hold, such as integers, floating-point numbers, or text.

Explanation: The Integer data type is used to store whole numbers.

Explanation: An 8-bit signed integer can store values in the range of -128 to 127.

Explanation: The Double data type is used to store decimal numbers with high precision.

Explanation: A variable is a named container used for storing data in a program.

Explanation: Many programming languages allow variable names to start with an underscore (_).

Explanation: The scope of a variable in programming determines the part of the program where the variable can be accessed and used.

Explanation: An immutable variable is one that cannot be changed after it is assigned a value.

Explanation: The Char data type is used to represent characters and text in programming.

Explanation: Declaring a variable involves giving it a name, specifying its data type, and optionally assigning a value to it.

Explanation: The Boolean data type is used to represent true or false values in programming.

Explanation: Local variables are declared within the scope of a function and are accessible only within that function, while global variables are declared outside of any function and are accessible throughout the program.

Explanation: Type casting is the process of converting a variable from one data type to another.

Explanation: The code increments the value of "x" by 3, resulting in a final value of 8.

Explanation: Initializing a variable involves assigning an initial value to it.

Explanation: The Boolean data type is used to represent true or false values in programming.

Explanation: In programming, the "null" value is used to represent an empty or undefined value for a variable.

Explanation: In many programming languages, when a number is concatenated with a string, it results in a string concatenation, so "5 + '3'" becomes "53."

Explanation: The Float data type is used to store decimal numbers with limited precision.

Explanation: The code increments "y" by 1 (y++), and then decrements it by 1 (y--), resulting in a final value of 10.

Explanation: In most programming languages, the semicolon (;) is used to denote the end of a statement.

Explanation: Variable names cannot start with a numeric digit in many programming languages.

Explanation: Declaring a constant in programming is used to define a value that cannot be changed during program execution.

Explanation: An array is a collection of variables that can hold values of the same data type.

Explanation: The String data type is used to represent text and strings in programming.