Optionality of else construct in JavaScript
The construct else is optional.
The following example will print a message
to the console only if the value of the
variable is 1. Otherwise,
nothing will just happen:
let test = 1;
if (test == 1) {
console.log('+++');
}
Check if the variable test is equal
to 10, then let's print 'yes'.
Otherwise, let nothing happen.
