The **`sqrt()` function** in R is used to calculate the *square root* of a non-negative number. 

Figure 1 shows the mathematical representation of the `sqrt()` function.

#    
#  Syntax
```r
sqrt(number)
```
#     
#  Parameter
`sqrt()` requires a non-negative number as a parameter.

##   
## Return value
`sqrt()` returns the square root of the number sent as a parameter. 
> If a negative number is sent as a parameter, then `sqrt()` returns `NaN`, along with a `warning` message.

##  
## Example

#Perfect square root
a <- sqrt(4);
print(paste0("sqrt(4): ", a))

b <- sqrt(0);
print(paste0("sqrt(0): ", b))

#simple number
c <- sqrt(5);
print(paste0("sqrt(5): ", c))

d <- sqrt(4.5);
print(paste0("sqrt(4.5): ", d))

#negative number
e <- sqrt(-2);
print(paste0("sqrt(-2): ", e))

How to calculate the square root of a number in R

Use R's sqrt() function to compute non-negative numbers' square roots; returns NaN for negative inputs.