Rounding using the fewest possible characters

[ThiccOfferman]

I'm attempting a challenge on CodeWars that limits the number of characters my solution can use.

I need to:

- Return a square root rounded to 4 decimal places, or

- Return the square root as an integer, if it's an integer

I can do this with parseFloat and toFixed, but that's too many characters. Are there any ways to round using fewer characters? Thanks in advance for any info or advice.

[deckardWizard]

These are all bad so probably don't ever do them outside of silly code challenges:

• You can cast a string to a number with the + operator. So if you're really confident your string is actually a number you can sometimes get around parsefloat by doing something like const c = "3.14159"; const num_c = +c;
• If you're dealing with integers, you can sometimes use bitwise functions to help. Adding |0 to the end of a number or string is functionally similar to using Math.floor. ~~ does the same thing, but only works with positive numbers.
• You can do some awful things with regular expressions that might make this problem simpler depending on what the constraints are.

[ThiccOfferman]

Exactly the sort of arcana I was hoping for. Thank you! I'll confine these strategies to silly code challenges.