Swift has a logical operator &&. The && operator is very useful, it takes in two values. For example, a && b works like:

• a is checked if it is true or false.
• Same with b if a is true. If a is false, return false
• Return true if a and b are true and false otherwise.

The && operator is equivalent to this function (it doesn't use any shortcuts so it is easier to understand for beginners):

func and(_ a: Bool, _ b: Bool) -> Bool {
  if (a == false) {
    return false; // stops function and returns false
  }
  else if (b == true) { // "a" must be true because it would return otherwise
    return true;
  } else {
    return false;
  }
}

So, && will only return true for true && true.

Make a function using &&.

Examples

and(true, false) ➞ false

and(true, true) ➞ true

and(false, true) ➞ false

and(false, false) ➞ false

Notes

N/A