Operators
Operators have operands. An operand is the value that is going to be operated on by the operator. For example, 3 + 4. The operator is + and the operands are 3 and 4. These could also be referred to as the left operand (3 in this case) and the right operand (4 in this case). If the operator has two operands then it is called a binary operator. If the operator only involves one operand then it is called a unary operator.
Math operators
+: add two numbers.-: subtract two numbers.*: multiply two numbers./: divide two numbers.%: divide two numbers, yield remainder.**: exponentation (e.g.2 ** 3 = 8) It raises the left operand to the power of the right operand.
Assignment Operators
=: assign value to variable.+=: adds the right operand to the left operand and assigns the result to the left operand.-=: subtracts the right operand from the left operand and assigns the result to the left operand.*=: multiplies the left operand by the right operand and assigns the result to the left operand./=: divides the left operand by the right operand and assigns the result to the left operand.%=: computes the remainder when dividing the left operand by the right operand and assigns the result to the left operand.
String concatenation
Concatenation typically refers to the process of combining strings or values together. You can use the + operator to concatenate strings.
Boolean operators
Booleans are used to determine whether or not a block gets executed, where any defined variable that is neither zero nor an empty string is treated as true.
AND(&&): true if ALL are true.OR(||): true if ONE is true.NOT(!): inverts true/false value.
Comparison Operators
JavaScript comparisons are used to determine whether two values are equal or not.
==: two values are equal if they have the same value, regardless of their data types.===: two values are equal if they have the same value and the same data type.!=: two values are not equal if they do not have the same value.!==: two values are strictly not equal if they do not have the same value or the same data type.>: checks if the first value is greater than the second value.<: checks if the first value is less than the second value.>=: checks if the first value is greater than or equal to the second value.<=: checks if the first value is less than or equal to the second value.