Computer scienceProgramming languagesJavaScriptBasicsData types

Strings and numbers

Decoding string and number operations

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Consider the following JavaScript program:

/* A simple JavaScript program */
let item1 = '12';
let item2 = '5';
let totalString = item1 + item2;
let totalNumber = Number(item1) + Number(item2);
/* Prints the string and number totals */
console.log(totalString);
console.log(totalNumber);

What are the data types and values of the variables 'totalString' and 'totalNumber', and what are the two outputs of this program?

Select one option from the list

'totalString' is a number with value 125, 'totalNumber' is a string with value '17'. The outputs are 125 and '17'.

'totalString' is a string with value '125', 'totalNumber' is a number with value 17. The outputs are '125' and 17.

'totalString' is a number with value 17, 'totalNumber' is a number with value 17. The outputs are 17 and 17.

'totalString' is a string with value '17', 'totalNumber' is a string with value '17'. The outputs are '17' and '17'.

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