First Exercise
I used the str.split() function to split the sentence into its component tokens. I wasn't sure how to create new variables for storing each word, so I just did some for-loops in order to print each word and concatenate the string back together.
#printing sentence
sentence = "All work and no play makes Jack a dull boy"
words = sentence.split() #split sentence into tokens and stores in array
for word in words:
print word #prints each word in the sentence on a separate line
new_sentence = ""
for word in words:
new_sentence = new_sentence + " " + word #strings together each word in the array, with spaces in between
print new_sentence.strip() #strip whitespaces from beginning and end of string before printing
Output
All
work
and
no
play
makes
Jack
a
dull
boy
All work and no play makes Jack a dull boy
Second Exercise
MPG would be calculated by dividing the miles driven by gallons of gas used. I created variables to represent both of these components, which would store user input. I used an if-else statement to determine whether the calculated MPG was efficient or inefficient. I stored the values as float values in order to prevent unneccessary rounding.
#Calculating MPG
miles_driven = float(input("Enter the number of miles driven"))
gallons_used = float(input("Enter the number of gallons of gas used"))
mpg = miles_driven / gallons_used
#based efficiency on levels stated in article below
#http://www.nytimes.com/2012/08/29/business/energy-environment/obama-unveils-tighter-fuel-efficiency-standards.html?_r=0
if mpg >= 29: #checks to see if mpg is >= a good fuel efficiency value
print "Your MPG is %s. Your car has a high fuel efficiency." %mpg
else:
print "Your MPG is %s. Your car has a low fuel efficiency." %mpg
Output
I entered inputs of miles_driven = 1050 and gallons_used = 35
Your MPG is 30.0. Your car has a high fuel efficiency.
Third Exercise
Again, I stored the values as floats because I noticed the calculations were incorrect when I just used int
#Converting Celcius to Fahrenheit
celcius_temp = float(input("Enter a temperature in degrees celcius"))
fahrenheit_temp = ((celcius_temp*1.8) + 32) #formula found here: http://www.metric-conversions.org/temperature/celsius-to-fahrenheit.htm
print "The temperature you entered is equivalent to", fahrenheit_temp, "degrees Fahrenheit"
Output
I entered input of celcius_temp = 40
The temperature you entered is equivalent to 104.0 degrees Fahrenheit
Fourth Exercise
This exercise only required minor modifications to exercise three in order to solve the opposite problem (F to C).
#Converting Fahrenheit to Celcius
fahrenheit_temp = float(input("Enter a temperature in degrees fahrenheit"))
celcius_temp = (fahrenheit_temp - 32) / 1.8
print "The temperature you entered is equivalent to", celcius_temp, "degrees Celcius"
Output
I entered input of fahrenheit_temp = 101
The temperature you entered is equivalent to 38.3333333333 degrees Celcius
Fifth Exercise
I knew I'd need an if-elif-else statement, but I couldn't figure out how to handle a case where user input is incorrect (i.e. user enters a value other than 0 or 1). I thought I could include 'return' or some other call within that last statement in order to exit the if-elif-else and go back to the beginning, but that didn't work. Looking at this link I thought maybe I should put the code in a function; this would seem to enable me to call the function within the last else statement and start the process over in cases of invalid input. I was able to reuse the code from the third and fourth exercises within the if-elif statements.
#Temperature conversion following user input
def convert_temp():
conversion_type = int(input("Enter 0 if you would like to convert from Fahrenheit to Celcius; Enter 1 if you would like to convert from Celcius to Fahrenheit"))
if conversion_type == 0: #user wants to convert F to C
fahrenheit_temp = float(input("Enter a temperature in degrees fahrenheit"))
celcius_temp = (fahrenheit_temp - 32) / 1.8
print "The temperature you entered is equivalent to", celcius_temp, "degrees Celcius"
elif conversion_type == 1: #user wants to convert C to F
celcius_temp = float(input("Enter a temperature in degrees celcius"))
fahrenheit_temp = ((celcius_temp*1.8) + 32)
print "The temperature you entered is equivalent to", fahrenheit_temp, "degrees Fahrenheit"
else:
print "Your input is invalid" #in case of incorrect input
return convert_temp() #starts process over, allowing user to re-enter correct input
convert_temp()
Output
I entered input of conversion_type = 0 and fahrenheit_temp = 45
The temperature you entered is equivalent to 7.22222222222 degrees Celcius
I entered input of conversion_type = 1 and celcius_temp = 10
The temperature you entered is equivalent to 50.0 degrees Fahrenheit
I entered input of conversion_type = 2, then I'm prompted for more input (ultimately enter in input of 0 and fahrenheit_temp = 67)
Your input is invalid
The temperature you entered is equivalent to 19.4444444444 degrees Celcius