Square Root of a Number

To find the square root of a given number, import the dart:math package, call sqrt() function, and pass the number as argument to sqrt() function. sqrt() function returns a positive square root of the given number.

Dart Program

In the following program, we read a number into x, find its square root using sqrt() function.


import 'dart:io';
import 'dart:math';

void main(){
    //read number from user
    print('Enter x');
    var x = double.parse(stdin.readLineSync()!);

    var output = sqrt(x);

    print('sqrt(x) = $output');


Enter x
sqrt(x) = 4.0


In this Dart Tutorial, we learned how to find the square root of a given number.