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- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="UTF-8">
- <title>Сумма всех чисел</title>
- </head>
- <body>
- <script>
- var x = 100; //Напишите вместо 100 другое число
- function sumTo(n) {
- return (n*(n+1)/2);
- }
- alert(sumTo(x));
- </script>
- </body>
- </html>
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