Conditional(Ternary) operators - 04

We can simplify the if… else statement by ternary operators.

In the example above:

• The condition, "isNightTime" is provided before the ?.
  

• Two expressions follow the? and are separated by a colon:.
  

• If the condition evaluates to true, the first expression executes.
  

• If the condition evaluates to false, the second expression executes.

Use Multiple Conditional (Ternary) Operators

In the previous challenge, you used a single conditional operator. You can also chain them together to check for multiple conditions.
The following function uses if, else if, and else statements to check multiple conditions:

function findGreaterOrEqual(a, b) {
  if (a === b) {
    return "a and b are equal";
  }
  else if (a > b) {
    return "a is greater";
  }
  else {
    return "b is greater";
  }
}

The above function can be re-written using multiple conditional or ternary operators:

function findGreaterOrEqual(a, b) {
  return (a === b) ? "a and b are equal" 
    : (a > b) ? "a is greater" 
    : "b is greater";
}

It is considered best practice to format multiple conditional operators such that each condition is on a separate line, as shown above. Using multiple conditional operators without proper indentation may make your code hard to read. For example:

function findGreaterOrEqual(a, b) {
  return (a === b) ? "a and b are equal" : (a > b) ? "a is greater" : "b is greater";
}