Chaining If Else Statements
Problem Explanation
If
: the first conditional in every if/else statement, case the conditional is true, execute the code and ignore the rest.Else if
: can never be used as the first conditional. It is always a conditional after anif
, case the conditional is true, execute the code. Otherwise jumps into the next conditional.Else
: case all the previous conditionals are false, else is executed.
Hints
Hint 1
Remember that you can combine (chain) several if...else
statements one after the other until your last one using else if (condition) {do this}
.
Hint 2
Sometimes, when you write more code than you are used to and it doesn’t work, the little things are what betray us. Checking for missing semicolons, brackets, etc. can prove very useful.
Solutions
Solution 1 (Click to Show/Hide)
function testSize(num) {
// Only change code below this line
if (num < 5) {
return "Tiny";
} else if (num < 10) {
return "Small";
} else if (num < 15) {
return "Medium";
} else if (num < 20) {
return "Large";
} else {
return "Huge";
}
// Only change code above this line
}
Code Explanation
The function first checks the if
condition (num < 5)
. If it evaluates to true
, it returns the statement between the curly braces (“Tiny”). If it doesn’t, it checks the next condition until the last else
statement.