- 1. Input, print and numbers
- 2. Integer and float numbers
- 3. Conditions: if, then, else
- 4. For loop with range
- 5. Strings
- 6. While loop
- 7. Lists
- 8. Functions and recursion
- 9. Two-dimensional lists (arrays)
- 10. Sets
- 11. Dictionaries
- 12. JavaScript
- 13. HTML5 and CSS
- 14. Responsive Design with Bootstrap
- 15. jQuery

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# The length of the segment

## Statement

Given four real numbers representing cartesian coordinates: \( \left ( x_{1}, y_{1} \right ), \left ( x_{2}, y_{2} \right ) \). Write a function`distance(x1, y1, x2, y2)`

to compute the distance between the points \( \left ( x_{1}, y_{1} \right ) \) and \( \left ( x_{2}, y_{2} \right ) \). Read four real numbers and print the resulting distance calculated by the function. The formula for distance between two points can be found at Wolfram.

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In all the problems input the data using `input()`

and print the result using `print()`

.