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Maria Elijah

In Dart, we use the ** import keyword** to import libraries or other files within a program.

```
import library_name;
```

Assume we need some mathematical constant such as *pi* or a function like `sqrt()`

in our program, then we have to import the `dart: math`

.

The following code shows how to use the `import`

keyword in Dart.

// import keyword in dart import 'dart:math'; void main() { var radius = 4; var cir = 2 *pi * radius; print("The circumference of a circle: $cir"); // using sqrt() to find square root of 81 print("The square root of 81 is: ${sqrt(81)}"); }

- Line 2: We import the
`dart: math`

library to access the`pi`

and the`sqrt()`

function. - Line 3: We create a
`main()`

function. - Line 4: We declare a variable named
`radius`

and assign a value to it. - Line 5: We declare a variable named
`cir`

which holds the value from the computation. - Line 6: We display the result using
`print()`

. - Line 8: We calculate the square root of
*81*using the`sqrt()`

function from the`dart:math`

library. Finally, we display the result.

RELATED TAGS

dart

import

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Maria Elijah

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