basics/built_in_functions.ipynb

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   "source": [
    "# Built-in Functions in Python"
   ]
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    "### `round()`\n",
    "\n",
    "The `round()` function returns a floating-point number rounded to the specified number of decimals\n",
    "\n",
    "**syntax**: `round(number, number_of_decimals)`"
   ]
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       "14"
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   "source": [
    "x = 13.55\n",
    "round(x)"
   ]
  },
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       "3.89"
      ]
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   "source": [
    "a = 3.8898\n",
    "round(a, 3)"
   ]
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    "### `set()`\n",
    "\n",
    "The `set()` function is used to create a set in Python. \n",
    "\n",
    "**syntax**: `set(iterable)`"
   ]
  },
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     "data": {
      "text/plain": [
       "{1, 2, 3, 4, 5}"
      ]
     },
     "execution_count": 3,
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   ],
   "source": [
    "number = [1,2,3,4,5]\n",
    "set(number)"
   ]
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       "{1, 2, 3, 4, 9}"
      ]
     },
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   "source": [
    "duplicate_numbers = [1,2,3,4,2,9,1]\n",
    "set(duplicate_numbers)"
   ]
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    "### `slice()`\n",
    "\n",
    "The `slice()` function returns a slice object that is used to slice any sequence (string, tuple, list, etc..)\n",
    "\n",
    "**syntax**: `slice(start, stop, step)`"
   ]
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    {
     "data": {
      "text/plain": [
       "[1, 2]"
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   "source": [
    "numbers = [1,2,3,4,5,6,7,8,9]\n",
    "slice_numbers = slice(2) # it is equalant to 0:2\n",
    "numbers[slice_numbers]"
   ]
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     "data": {
      "text/plain": [
       "'ion returns a s'"
      ]
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     "execution_count": 9,
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   ],
   "source": [
    "s = 'function returns a slice object that is used to slice any sequence'\n",
    "slice_text = slice(5, 20) # starting from 5th character to 20th character\n",
    "s[slice_text]"
   ]
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    {
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       "'i tna'"
      ]
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   "source": [
    "s = 'function returns a slice object that is used to slice any sequence'\n",
    "slice_text = slice(5, 20, 3) # starting from 5th character to 20th character, every 3rd char\n",
    "s[slice_text]"
   ]
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    "### `sorted()`\n",
    "\n",
    "The `sorted()` function is used to sort the iterables like list, tuples and strings. \n",
    "\n",
    "**syntax**: `sorted(iterable, Key=None, reverse=False)`"
   ]
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    {
     "data": {
      "text/plain": [
       "[2, 8, 11, 12, 14, 21]"
      ]
     },
     "execution_count": 10,
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   "source": [
    "numbers = [11, 14, 21, 12, 8, 2]\n",
    "sorted(numbers)"
   ]
  },
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   "source": [
    "sort the numbers in descending order"
   ]
  },
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      "text/plain": [
       "[21, 14, 12, 11, 8, 2]"
      ]
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     "execution_count": 11,
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   ],
   "source": [
    "numbers = [11, 14, 21, 12, 8, 2]\n",
    "sorted(numbers, reverse=True)"
   ]
  },
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   "source": [
    "**sort the words based on the length of the word**"
   ]
  },
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   "execution_count": 12,
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "['cat', 'dog', 'ball', 'fish', 'apple', 'mobile', 'chocolate']"
      ]
     },
     "execution_count": 12,
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    }
   ],
   "source": [
    "words = ['apple', 'ball', 'cat', 'dog', 'fish', 'chocolate', 'mobile']\n",
    "\n",
    "sorted(words, key=len)"
   ]
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   "source": [
    "More examples on sorted in the future threads 🧵"
   ]
  },
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