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How do it make “`var num = 12;“` to be equal to 3 using javascript? [closed]

I have a variable var num = 12; And i want to add both integers (1 and 2) in the num to equals 3 in javascript.

Can someone solve this? I have tried and i need help.


You could turn the number into an array of strings then use the map and reduce function to change them to numbers and add them together like so:

let num = 12;
let sum = [...`${num}`].map(Number).reduce((a, b) => a + b);
or [...`${num}`].reduce((a, b) => +a + +b);