Definition:
“Operators are used to assign values, compare values, perform arithmetic operations and more. Operators allow programmers to create a single value from one or more values.”
Binary Operators(이항 연산자):
Definition: Requires two operands, one before the operator and one after the operator.
Syntax: operand1 operator operand2
2 + 3; or x * z;Unary Operators(단항 연산자):
Definition: Requires a single operand, either before or after the operator.
Syntax: operator operand OR operand operator
y++ OR ++yArithmetic Operators : Multiplication, Division, Modulus, Addition and Subtraction
Definition:
Takes numerical values (either literals or variables) as their operands and returns a single numerical value.
Comparison Operators(비교 연산자):
방정식의 양쪽을 비교하고 비교가 참인지 여부에 따라 논리 값을 반환합니다. 피연산자는 숫자 값, 문자열 값, 논리적 값 또는 객체 값일 수 있습니다.
== : 연산자를 이용하여 서로 다른 유형의 두 변수의 [값] 비교
=== : 는 엄격한 비교를 하는 것으로 알려져 있다 ([값 & 자료형] -> true). 되도록이면 이 연산자를 사용할 것.
5 == '5'; // true
5 === '5' // false 부등 비교 연산자
!= : 동등 연산자( == ) 의 논리적인 반대값이 됩니다. 동등 연산자로 비교시 true일 경우, 부등 연산자는 그 반대인 false를 반환 합니다. 즉, 동등 연산자의 반대값이 됩니다.
!== : 엄격한 등등 비교 연산자(===)의 논리적인 반대가 됩니다. 즉, 엄격하게 동등 연산자로 비교한 값의 반대값을 반환합니다.
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