# Get the Square Root in R using sqrt()

In this tutorial, we will look at how to get the square root for a number (or values in a vector) in R with the help of some examples.

## How to get the square root of a number in R?

You can use the built-in math function `sqrt()` to get the square root (also called the root) of a number in R. Pass the number for which you want to get the square root as an argument to the `sqrt()` function. The following is the syntax –

`sqrt(x)`

It returns the square root of the passed number. Note that you can apply the `sqrt()` function to a numeric vector, array, matrix, and a dataframe as well.

## Examples

Let’s look at some examples of using the `sqrt()` function in R.

### Get the square root of a number in R

First, we will apply the `sqrt()` function directly to a number, for example, 4.

```# sq root of 4
print(sqrt(4))```

Output:

` 2`

We get the square root of 4 as 2, which is the correct answer.

### Square root of each value in a vector

You can similarly apply the `sqrt()` function to a numeric vector in R. Note that individual values in R can be regarded as a vector of length one. If you apply the `sqrt()` function to a numeric vector, it will compute the square root for each value in the vector.

Let’s look at an example.

```# sq root of values in a vector
vec <- c(1, 4, 9, 16, 25)
print(sqrt(vec))```

Output:

` 1 2 3 4 5`

You can see that we get a vector with the square root for each value in the passed vector. We get 1, 2, 3, 4, and 5 as the square root values for the numbers 1, 4, 9, 16, and 25 respectively.

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