Plus Concatenation String operator in JavaScript [duplicate]

Question

I came across the scenario trying with different operating concatenations. I am wondering how this condition was working for the 2nd statement.

console.log("10"+9); // 109
Console.log("10"-9); //1

Can Someone tell me what's happening here?

Sebastian Simon · Accepted Answer · 2021-10-24 13:10:05Z

4

+ is used for both string concatenation and addition. If either operand is a string, concatenation is used. - is only used for subtraction, both operants are always coerced to numbers.

edited Oct 24, 2021 at 13:10

Sebastian Simon

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answered Oct 24, 2021 at 12:59

Sanka Sanjeeva

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Comments

lukas.j · Accepted Answer · 2021-10-24 12:58:28Z

0

The plus sign is both an Arithmetic operator and the String Concatenation operator. The concatenation has precedence.

answered Oct 24, 2021 at 12:58

lukas.j

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