# Language - Expression

Expressions:

The expression execution order is determined by control-flow statements like if and for.

An expression is any reference to a variable or value, or a set of variable( s) and value( s) combined with operators.

## 3 - List

• Mathematics Expression
• expression statement: a general expression that stands alone, generally it's used as a call expression statement to call a Function.

## 4 - Example

a = b * 2;

This statement has four expressions in it:

• 2 is a literal value expression.
• b is a variable expression, which means to retrieve its current value.
• b * 2 is an arithmetic expression, which means to do the multiplication.
• a = b * 2 is an assignment expression, which means to assign the result of the b * 2 expression to the variable a.