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39 lines (37 loc) · 1.09 KB
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<script>
'use strict'
function getResultString(Num){
let str_num = String(Num)
let last_char = str_num.charAt(str.length-1)
let pre_last_char
if(str_num.length > 1){
pre_last_char = str_num.charAt(str.length-2)
}
//если от 10 до 19 то рублей
if(pre_last_char == '1'){
return Num + ' рублей'
}
//если остальные варианты то проверяем
switch(last_char){
case '2':
case '3':
case '4':
return Num + ' рубля'
case '1':
return Num + ' рубль'
default :
return Num + ' рублей'
}
}
let str = prompt("введите сумму")
alert(getResultString(str))
</script>
</body>
</html>