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1-js/05-data-types/03-string/article.md

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@@ -201,16 +201,16 @@ alert( str ); // hi
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Więcej przykładów zobaczymy w kolejnych sekcjach.
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## Changing the case
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## Zmiana wielkości znaków
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Methods [toLowerCase()](mdn:js/String/toLowerCase) and [toUpperCase()](mdn:js/String/toUpperCase) change the case:
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Metody [toLowerCase()](https://developer.mozilla.org/pl/docs/Web/JavaScript/Reference/Global_Objects/String/toLowerCase) i [toUpperCase()](https://developer.mozilla.org/pl/docs/Web/JavaScript/Reference/Global_Objects/String/toUpperCase) zmieniają wielkość liter:
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```js run
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alert( 'Interface'.toUpperCase() ); // INTERFACE
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alert( 'Interface'.toLowerCase() ); // interface
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```
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Or, if we want a single character lowercased:
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Lub, jeśli chcemy, aby jeden znak był pisany małymi literami:
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```js
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alert( 'Interface'[0].toLowerCase() ); // 'i'

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