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Lære Built-in functions | Functions
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Built-in functions

What if I ask you to define the maximum number in the list? Surely, using acquired knowledge, you can write a loop and check if the current element is greater/less than the previous and rewrite it, otherwise - continue... But in the case of big lists, this approach is very time-harmful... This task can be solved by using some built-in function.

  • min(x, y, ...) - minimum element of x, y, ...

  • max(x, y, ...) - maximum element of x, y, ...

  • abs(x) - absolute value of number

  • round(x, n) - rounds number x to n digits

  • pow(x, n) - x raised to the power n

For example, for countries we can calculate population density (population/area) and round result to 2 digits

1234567
countries = [["USA", 9629091, 331002651], ["Canada", 9984670, 37742154], ["Germany", 357114, 83783942], ["Brazil", 8515767, 212559417], ["India", 3166391, 1380004385]] # calculate population density for countries for i in range(len(countries)): if type(countries[i]) is list: print(countries[i][0], 'has population density:', round(countries[i][2]/countries[i][1], 2))
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In the people list, all the heights are in cm. Transform it into inches (divide by 2.54), round result to 2 digits and print message "Name has height of x inches".

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Switch to desktopSkift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder
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book
Built-in functions

What if I ask you to define the maximum number in the list? Surely, using acquired knowledge, you can write a loop and check if the current element is greater/less than the previous and rewrite it, otherwise - continue... But in the case of big lists, this approach is very time-harmful... This task can be solved by using some built-in function.

  • min(x, y, ...) - minimum element of x, y, ...

  • max(x, y, ...) - maximum element of x, y, ...

  • abs(x) - absolute value of number

  • round(x, n) - rounds number x to n digits

  • pow(x, n) - x raised to the power n

For example, for countries we can calculate population density (population/area) and round result to 2 digits

1234567
countries = [["USA", 9629091, 331002651], ["Canada", 9984670, 37742154], ["Germany", 357114, 83783942], ["Brazil", 8515767, 212559417], ["India", 3166391, 1380004385]] # calculate population density for countries for i in range(len(countries)): if type(countries[i]) is list: print(countries[i][0], 'has population density:', round(countries[i][2]/countries[i][1], 2))
copy
Opgave

Swipe to start coding

In the people list, all the heights are in cm. Transform it into inches (divide by 2.54), round result to 2 digits and print message "Name has height of x inches".

Løsning

Switch to desktopSkift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder
Var alt klart?

Hvordan kan vi forbedre det?

Tak for dine kommentarer!

close

Awesome!

Completion rate improved to 2.33

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