Basic Operators

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Terminologies

• An operator is a reserved syntax consisting of punctuation or alphanumeric characters that carries out built-in functionality. e.g addition operator (“+“), subtraction operator (“–“). 
• An operator can be unary or binary.
• An operand – is what operators are applied to.

Math operators

• The following math operations are supported in JavaScript: 
  • Addition +, 
  • Subtraction -,
  • Multiplication *,
  • Division /,
  • Remainder %,
  • Exponentiation **
• Remember If an expression has more than one operator, the execution order is defined by their precedence, or, in other words, the default priority order of operators.
• binary + is applied to strings, it merges (concatenates) them:

• We know many operators from school. They are things like addition +, multiplication *, subtraction -, and so on. Show examples
• Remember If an expression has more than one operator, the execution order is defined by their precedence, or, in other words, the default priority order of operators.
• Parentheses override any precedence, so if we’re not satisfied with the default order, we can use them to change it. For example, write (1 + 2) * 2.
• Let’s meet features of JavaScript operators that are beyond school arithmetics. So operators like addition works for strings. Show example
  • if the binary + is applied to strings, it merges (concatenates) them:

Next, let’s talk about JavaScript-specific operators, not covered by school arithmetic.