Here’s a quiz for you (the answer is at the bottom of the post).
What is the expected output of these three lines of code, and why is it like that?
//Question 1
console.log('6' + 2);
//Question 2
console.log('6' - 2);
//Question 3
console.log('6' * '2');
This isn’t as straight forward as you might think, and will not produce the “expected” output.
Answer:
Some operators in JavaScript do Type conversion when used.
1- The Number 2 is added as a String to the String 6, so the output is 62
2- The String 6 is converted to Number 6 and the Number 2 is subtracted from the Number 6. Output is 4
3- The String 6 and the String 2 are both converted to Numbers and are multiplied as Numbers. Output is therefor 12
JavaScript is a wonderful language to learn and use 😉