Conditions, branching, loops

Python 5 : Conditions, branching, loops.ipynb

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                    "output_type": "execute_result"
                }
            ], 
            "source": "# Use Equality sign to compare the strings\n\n\"ACDC\" == \"Michael Jackson\""
        }, 
        {
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            "cell_type": "code", 
            "metadata": {}, 
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                    "data": {
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                    "output_type": "execute_result"
                }
            ], 
            "source": "# Use Inequality sign to compare the strings\n\n\"ACDC\" != \"Michael Jackson\""
        }, 
        {
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            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
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                    "metadata": {}, 
                    "data": {
                        "text/plain": "True"
                    }, 
                    "output_type": "execute_result"
                }
            ], 
            "source": "# Compare characters\n\n'BA' > 'AB'"
        }, 
        {
            "execution_count": 4, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "you can enter\nmove on\n"
                }
            ], 
            "source": "# If statement example\n\nage = 19\n#age = 18\n\n#expression that can be true or false\nif age > 18:\n    \n    #within an indent, we have the expression that is run if the condition is true\n    print(\"you can enter\" )\n\n#The statements after the if statement will run regardless if the condition is true or false \nprint(\"move on\")"
        }, 
        {
            "execution_count": 5, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "go see Meat Loaf\nmove on\n"
                }
            ], 
            "source": "# Else statement example\n\nage = 18\n# age = 19\n\nif age > 18:\n    print(\"you can enter\" )\nelse:\n    print(\"go see Meat Loaf\" )\n    \nprint(\"move on\")"
        }, 
        {
            "execution_count": 6, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "go see Pink Floyd\nmove on\n"
                }
            ], 
            "source": "# Elif statment example\n\nage = 18\n\nif age > 18:\n    print(\"you can enter\" )\nelif age == 18:\n    print(\"go see Pink Floyd\")\nelse:\n    print(\"go see Meat Loaf\" )\n    \nprint(\"move on\")"
        }, 
        {
            "execution_count": 7, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "do something..\n"
                }
            ], 
            "source": "# Condition statement example\n\nalbum_year = 1983\nalbum_year = 1970\n\nif album_year > 1980:\n    print(\"Album year is greater than 1980\")\n    \nprint('do something..')"
        }, 
        {
            "execution_count": 8, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "Album year was in between 1980 and 1989\n\nDo Stuff..\n"
                }
            ], 
            "source": "# Condition statement example\n\nalbum_year = 1980\n\nif(album_year > 1979) and (album_year < 1990):\n    print (\"Album year was in between 1980 and 1989\")\n    \nprint(\"\")\nprint(\"Do Stuff..\")"
        }, 
        {
            "execution_count": 9, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "Album was not made in the 1980's\n"
                }
            ], 
            "source": "# Condition statement example\n\nalbum_year = 1990\n\nif(album_year < 1980) or (album_year > 1989):\n    print (\"Album was not made in the 1980's\")\nelse:\n    print(\"The Album was made in the 1980's \")"
        }, 
        {
            "execution_count": 10, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "Album year is not 1984\n"
                }
            ], 
            "source": "# Condition statement example\n\nalbum_year = 1983\n\nif not (album_year == '1984'):\n    print (\"Album year is not 1984\")"
        }, 
        {
            "execution_count": 12, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "This album is Amazing!\n"
                }
            ], 
            "source": "# Write an if statement to determine if an album had a rating greater than 8. Test it using the rating for the album \u201cBack in Black\u201d that had a rating of 8.5.\n#If the statement is true print \"This album is Amazing!\"\n\nback_in_black = 8.5\nif (back_in_black > 8):\n    print (\"This album is Amazing!\")"
        }, 
        {
            "execution_count": 16, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "1979\n"
                }
            ], 
            "source": "# Write an if statement to determine if an album came out before 1980 or in the years: 1991 or 1993. \n# If the condition is true print out the year the album came out.\n\nalbum_year = 1979\nif ((album_year<1980) or (album_year==1991)  or (album_year==1993)):\n    print (album_year)\nelse:\n    print (\"different year\")\n    "
        }, 
        {
            "execution_count": 17, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "different year\n"
                }
            ], 
            "source": "# Write an if statement to determine if an album came out before 1980 or in the years: 1991 or 1993. \n# If the condition is true print out the year the album came out.\n\nalbum_year = 1982\nif ((album_year<1980) or (album_year==1991)  or (album_year==1993)):\n    print (album_year)\nelse:\n    print (\"different year\")"
        }, 
        {
            "execution_count": 1, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "1982\n1980\n1973\n"
                }
            ], 
            "source": "# For loop example\n\ndates = [1982,1980,1973]\nN = len(dates)\n\nfor i in range(N):\n    print(dates[i])  "
        }, 
        {
            "execution_count": 2, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "1982\n1980\n1973\n"
                }
            ], 
            "source": "# Example of for loop, loop through list\n\nfor year in dates:  \n    print(year)  "
        }, 
        {
            "execution_count": 3, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "Before square  0 is red\nAfter square  0 is weight\nBefore square  1 is yellow\nAfter square  1 is weight\nBefore square  2 is green\nAfter square  2 is weight\nBefore square  3 is purple\nAfter square  3 is weight\nBefore square  4 is blue\nAfter square  4 is weight\n"
                }
            ], 
            "source": "# Use for loop to change the elements in list\n\nsquares = ['red', 'yellow', 'green', 'purple', 'blue']\n\nfor i in range(0, 5):\n    print(\"Before square \", i, 'is',  squares[i])\n    squares[i] = 'weight'\n    print(\"After square \", i, 'is',  squares[i])"
        }, 
        {
            "execution_count": 4, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "0 red\n1 yellow\n2 green\n3 purple\n4 blue\n"
                }
            ], 
            "source": "# Loop through the list and iterate on both index and element value\n\nsquares=['red', 'yellow', 'green', 'purple', 'blue']\n\nfor i, square in enumerate(squares):\n    print(i, square)"
        }, 
        {
            "execution_count": 5, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "1982\n1980\n1973\nIt took  3 repetitions to get out of loop.\n"
                }
            ], 
            "source": "# While Loop Example\n\ndates = [1982, 1980, 1973, 2000]\n\ni = 0\nyear = 0\n\nwhile(year != 1973):\n    year = dates[i]\n    i = i + 1\n    print(year)\n\nprint(\"It took \", i ,\"repetitions to get out of loop.\")"
        }, 
        {
            "execution_count": 8, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "-5\n-4\n-3\n-2\n-1\n0\n1\n2\n3\n4\n5\n"
                }
            ], 
            "source": "#Write a for loop the prints out all the element between -5 and 5 using the range function.\n\nfor i in range(-5,6):\n    print(i)"
        }, 
        {
            "execution_count": 11, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "rock\nR&B\nSoundtrack\nR&B\nsoul\npop\n"
                }
            ], 
            "source": "#Print the elements of the following list: Genres=[ 'rock', 'R&B', 'Soundtrack', 'R&B', 'soul', 'pop'] Make sure you follow Python conventions.\n\nGenres=['rock','R&B','Soundtrack','R&B','soul', 'pop']\nn = len(Genres)\nfor i in range (n):\n    print(Genres[i])"
        }, 
        {
            "execution_count": 12, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "rock\nR&B\nSoundtrack\nR&B\nsoul\npop\n"
                }
            ], 
            "source": "#Print the elements of the following list: Genres=[ 'rock', 'R&B', 'Soundtrack', 'R&B', 'soul', 'pop'] Make sure you follow Python conventions.\n\nGenres=['rock','R&B','Soundtrack','R&B','soul', 'pop']\nfor genre in Genres:\n    print(genre)"
        }, 
        {
            "execution_count": 13, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "red\nyellow\ngreen\npurple\nblue\n"
                }
            ], 
            "source": "#Write a for loop that prints out the following list: squares=['red', 'yellow', 'green', 'purple', 'blue']\n\nsquares=['red', 'yellow', 'green', 'purple', 'blue']\nfor colour in squares:\n    print(colour)"
        }, 
        {
            "execution_count": 5, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "10\n9.5\n10\n8\n7.5\n"
                }
            ], 
            "source": "#Write a while loop to display the values of the Rating of an album playlist stored in the list PlayListRatings. \n#If the score is less than 6, exit the loop. The list PlayListRatings is given by: PlayListRatings = [10, 9.5, 10, 8, 7.5, 5, 10, 10]\n\nListRatings = [10, 9.5, 10, 8, 7.5, 5, 10, 10]\ni=1\nrating = ListRatings[0]\nwhile (rating>=6):\n    print(rating)\n    rating = ListRatings[i]\n    i=i+1\n"
        }, 
        {
            "execution_count": 1, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [
                {
                    "output_type": "stream", 
                    "name": "stdout", 
                    "text": "orange\norange\n"
                }
            ], 
            "source": "#Write a while loop to copy the strings 'orange' of the list squares to the list new_squares. \n#Stop and exit the loop if the value on the list is not 'orange':\n\nsquares = ['orange', 'orange', 'purple', 'blue ', 'orange']\nnewsquares = []\n\ni = 0\n\nwhile (squares[i]=='orange'):\n    newsquares.append(squares[i])\n    i=i+1\n    \nfor colour in newsquares:\n    print (colour)\n\n\n"
        }, 
        {
            "execution_count": null, 
            "cell_type": "code", 
            "metadata": {}, 
            "outputs": [], 
            "source": ""
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