Assume that we want to estimate the square root of the number three. However, after issuing the following lines of code, we would encounter an error message:

>>>sqrt(3)SyntaxError: invalid syntax>>>

The reason is that the `sqrt()`

function is not a built-in function. To use the `sqrt()`

function, we need to import the `math`

module first as follows:

>>>import math>>>x=math.sqrt(3)>>>round(x,4)1.7321

To use the
`sqrt()`

function, we have to type `math.sqrt()`

if we use the `import math`

command to upload the `math`

module. In addition, after issuing the command `dir()`

, we will see the existence of the `math`

module, which is the last one in the output shown as follows:

>>>dir()['__builtins__', '__doc__', '__name__', '__package__', 'math'] ...

Start Free Trial

No credit card required