find the square root of a number in javascript

One way to find the square root of a number in JavaScript is by using the Math.sqrt() method. This method returns the square root of a number.

Here's an example:

index.tsx
let num = 16;
let result = Math.sqrt(num);
console.log(result);  // Output: 4
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Alternatively, you can use an algorithm to find the square root of a number manually. Here's an example of the Babylonian method:

index.tsx
function sqrt(number) {
  let guess = number / 2; // initial guess
  let prevGuess;
  do {
    prevGuess = guess;
    guess = (guess + number / guess) / 2;
  } while(Math.abs(guess - prevGuess) >= 0.0001); // tolerance level of 0.0001

  return guess;
}

let num = 25;
let result = sqrt(num);
console.log(result);  // Output: 5
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In this code block, the sqrt() function uses the Babylonian method to find the square root of a number. The function takes a number as input, initializes an initial guess, and then iteratively refines the guess until an acceptable tolerance level is reached. The result is returned as the final guess.