Day72 - list comprehension Questions.ipynb

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   "source": [
    "# **List Comprehension Questions**"
   ]
  },
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   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### `1.Write a Python code to create a new list that contains only the even numbers from the given list.`\n",
    "\n"
   ]
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   "execution_count": 1,
   "metadata": {},
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     "text": [
      "[2, 4, 6, 8, 10]\n"
     ]
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   "source": [
    "# Sample Input\n",
    "numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]\n",
    "\n",
    "# Solution using list comprehension\n",
    "even_numbers = [num for num in numbers if num % 2 == 0]\n",
    "\n",
    "# Output\n",
    "print(even_numbers)"
   ]
  },
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   "source": [
    "### `2. Write a Python code to create a new list that contains squares of even numbers and cubes of odd numbers from the given list.`"
   ]
  },
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   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[1, 4, 27, 16, 125, 36, 343, 64, 729, 100]\n"
     ]
    }
   ],
   "source": [
    "# Sample Input\n",
    "numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]\n",
    "\n",
    "# Solution using list comprehension\n",
    "result = [num ** 2 if num % 2 == 0 else num ** 3 for num in numbers]\n",
    "\n",
    "# Output\n",
    "print(result)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### `3.Write a Python code to create a new list that contains the squares of numbers from 1 to 10.`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[1, 4, 9, 16, 25, 36, 49, 64, 81, 100]\n"
     ]
    }
   ],
   "source": [
    "squred_numbers = [num ** 2 for num in range(1,11)]\n",
    "\n",
    "# output\n",
    "print(squred_numbers)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### `4.Given two lists, create a new list that contains the common elements using list comprehension.`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[3, 4, 5]\n"
     ]
    }
   ],
   "source": [
    "list1 = [1, 2, 3, 4, 5]\n",
    "list2 = [3, 4, 5, 6, 7]\n",
    "\n",
    "common_elements = [x for x in list1 if x in list2]\n",
    "\n",
    "print(common_elements)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### `5.Given a list of numbers, create a new list that contains the square of each number if it is positive, and zero otherwise.`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[1, 0, 9, 0, 25, 0]\n"
     ]
    }
   ],
   "source": [
    "numbers = [1, -2, 3, -4, 5, -6]\n",
    "\n",
    "squares = [x**2 if x > 0 else 0 for x in numbers]\n",
    "\n",
    "print(squares)\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### `6.Write a list comprehension to extract all the vowels from a given string.`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "['e', 'o', 'o']\n"
     ]
    }
   ],
   "source": [
    "input_string = \"hello world\"\n",
    "\n",
    "vowels = [char for char in input_string if char.lower() in 'aeiou']\n",
    "\n",
    "print(vowels)\n"
   ]
  }
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