Unit_2_2_Java Expressions

Expression

A combination of one or more operators and operands.

Arithmetic Operators

Operators used to perform arithmetic calculations: addition (+), subtraction (-), multiplication (*), division (/), and remainder (%)

Operator Precedence

A set of rules that determines the order in which operators are evaluated in expressions.

Remainder Operator (%)

Returns the remainder after dividing the first operand by the second.

Increment Operator (++)

An operator that increases the value of a variable by one.

Decrement Operator (--)

An operator that decreases the value of a variable by one.

Assignment Operator (=)

An operator that assigns the value of the right-hand side expression to the variable on the left-hand side.

Casting

The process of converting one data type into another by explicitly specifying the type.

Data Conversion

The process of converting data from one type to another, like treating an integer as a floating-point value.

Widening Conversion

A safe conversion from a smaller data type to a larger data type.

Narrowing Conversion

A conversion from a larger data type to a smaller data type, which can lead to loss of information.

Scanner Class

A class in Java that is used to read input values of various types from different sources.

nextLine() Method

A method of the Scanner class that reads an entire line of text until the end of the line.

Tokens

Elements separated by white space in the input, such as spaces, tabs, and new line characters.

Promotion

Automatic conversion of one data type to another during operations, usually from a smaller to a larger type.

Assignment Conversion

Occurs when a value of one type is assigned to a variable of a different type, allowing only widening conversions.