expression - a piece of code that produces a value, operator - symbols that affect neighboring values, += increment by  - increase a variable by an amount, -= decrement by  - decrease a variable by an amount, *= multiply by - multiply a variable by an amount, /= divide by - divide a variable by an amount, modulus - get the remainder after division, = Assignment Operator - Stores the value on the right-hand side in the variable on the left-hand side, + Addition - Adds two numbers together, + (Concatenation) - Joins two strings together, - Substraction - Subtracts the second value from the first value or designates a number literal as negative, * Multiplication - Multiplies two numbers together, / Division - Divides the first value by the second value,

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