nodejs use or in if statement code example

Example 1: how many else statements can be added in javascript

if (condition a) {
    // code that will execute if condition a is true
} else if (condition b) {
    // code that will execute if condition b is true
} else if (condition c) {
    // code that will execute if condition c is true
} else {
    // code that will execute if all above conditions are false
}

Example 2: function if else javascript

function lessThan100(a, b) {
  let sum;
  if (a + b >= 100) {
    result = false;
  } else {
    result = true;
  }
  return result;
}