Can someone explain this code?

Question

if(+'15' === 15) {
document.write('true');
} else if('15' === 15) {
document.write('false');
} else {
document.write('soloLearn');
}

Why it evaluates to true instead of sololearn?
What does that + sign stands for in the first condition block. I tried to google it but can't find the answer. Does it converts the string 15 into a number?

Answer 1

"Does it convert string 15 into a number?"
Yes 👍

Answer 2

Ipang Thanks for the confirmation.

Answer 3

+ right before a numerical string just converts it to a number (or tries to). So you're essentially asking if '15', converted to a number, has the same value and type as 15 (a number)

Answer 4

HealyUnit Exactly