Rolling scopes school master

src/index.js

@@ -1,3 +1,80 @@
-module.exports = function toReadable(/* number */) {
-  throw new Error('Not implemented');
+module.exports = function toReadable(number) {
+  let str = '';
+  const numberLessTwenty = {
+    0: 'zero',
+    1: 'one',
+    2: 'two',
+    3: 'three',
+    4: 'four',
+    5: 'five',
+    6: 'six',
+    7: 'seven',
+    8: 'eight',
+    9: 'nine',
+    10: 'ten',
+    11: 'eleven',
+    12: 'twelve',
+    13: 'thirteen',
+    14: 'fourteen',
+    15: 'fifteen',
+    16: 'sixteen',
+    17: 'seventeen',
+    18: 'eighteen',
+    19: 'nineteen',
+  };
+
+  if (number < 20) {
+    str = numberLessTwenty[number];
+  }
+
+  const numberTwentyToNinety = {
+    20: 'twenty',
+    30: 'thirty',
+    40: 'forty',
+    50: 'fifty',
+    60: 'sixty',
+    70: 'seventy',
+    80: 'eighty',
+    90: 'ninety',
+  };
+  if (number > 19 && number < 100) {
+    if (number % 10 === 0) {
+      for (let i = 0; i < +Object.keys(numberTwentyToNinety).length; i += 1) {
+        if (+Object.keys(numberTwentyToNinety)[i] === number) {
+          str = numberTwentyToNinety[number];
+        }
+      }
+    } else {
+      const remainder = number % 10;
+      const checkNumber = number - remainder;
+      str = `${numberTwentyToNinety[checkNumber]} ${numberLessTwenty[remainder]}`;
+    }
+  }
+
+  if (number >= 100) {
+    const hungred = Math.floor(number / 100);
+    const k = number - hungred * 100;
+
+    if (number % 100 === 0) {
+      str = `${numberLessTwenty[hungred]} hundred`;
+    }
+
+    if (k > 19 && k < 100) {
+      if (k % 10 === 0) {
+        for (let i = 0; i < +Object.keys(numberTwentyToNinety).length; i += 1) {
+          if (+Object.keys(numberTwentyToNinety)[i] === k) {
+            str = `${numberLessTwenty[hungred]} hundred ${numberTwentyToNinety[k]}`;
+          }
+        }
+      } else {
+        const remainder = k % 10;
+        const checkNumber = k - remainder;
+        str = `${numberLessTwenty[hungred]} hundred ${numberTwentyToNinety[checkNumber]} ${numberLessTwenty[remainder]}`;
+      }
+    }
+    if (k < 20) {
+      str = `${numberLessTwenty[hungred]} hundred ${numberLessTwenty[k]}`;
+    }
+  }
+  return str;
 };