--description--
In the last two challenges, we learned about the equality operator (==
) and the strict equality operator (===
). Let's do a quick review and practice using these operators some more.
If the values being compared are not of the same type, the equality operator will perform a type conversion, and then evaluate the values. However, the strict equality operator will compare both the data type and value as-is, without converting one type to the other.
Examples
3 == '3'
returns true
because JavaScript performs type conversion from string to number. 3 === '3'
returns false
because the types are different and type conversion is not performed.
Note: In JavaScript, you can determine the type of a variable or a value with the typeof
operator, as follows:
typeof 3
typeof '3'
typeof 3
returns the string number
, and typeof '3'
returns the string string
.
--instructions--
The compareEquality
function in the editor compares two values using the equality operator. Modify the function so that it returns the string Equal
only when the values are strictly equal.
--hints--
compareEquality(10, "10")
should return the string Not Equal
assert(compareEquality(10, '10') === 'Not Equal');
compareEquality("20", 20)
should return the string Not Equal
assert(compareEquality('20', 20) === 'Not Equal');
You should use the ===
operator
assert(__helpers.removeJSComments(code).match(/===/g));
--seed--
--seed-contents--
// Setup
function compareEquality(a, b) {
if (a == b) { // Change this line
return "Equal";
}
return "Not Equal";
}
compareEquality(10, "10");
--solutions--
function compareEquality(a,b) {
if (a === b) {
return "Equal";
}
return "Not Equal";
}