The following code gives weird results:
console.log( + 1 + 10 + 2 - 5 + 8);I've tried inputting various different values to work it out but I cannot understand what's going on under the hood.
+ 1 === 1
1 + 10 === 110
110 + 2 === 1102
1102 - 5 === 1097
1097 + 8 === 10978
In JavaScript, the + operator is used for both numeric addition and string concatenation. When you add a number to a string the interpreter converts your number to a string and concatenates both together.
When you use the - operator, however, the string is converted back into a number so that numeric subtraction may occur.
When you then add a string 8, string concatenation occurs again. The number 1097 is converted into the string 1097, and then joined with 8.
