Conditional Statements in JavaScript

Keywords: JavaScript if else, JavaScript conditional statements

If-Else

javascriptCopyEditlet age = 18;
if (age >= 18) {
  console.log("Adult");
} else {
  console.log("Minor");
}

Else If

javascriptCopyEditif (score >= 90) {
  console.log("A");
} else if (score >= 75) {
  console.log("B");
} else {
  console.log("C");
}

Switch Statement

javascriptCopyEditlet day = "Monday";
switch(day) {
  case "Monday": console.log("Start of week"); break;
  case "Friday": console.log("Weekend soon"); break;
  default: console.log("Midweek");
}

Ternary Operator

javascriptCopyEditlet canVote = age >= 18 ? "Yes" : "No";

Truthy & Falsy Values

Falsy values: 0, "", null, undefined, NaN, false
Truthy: everything else