# write an expression whose value is the last character in the str associated with s.

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A few problems from a CS homework due tonight!

Please help! Using Python 3.4

**1. Write an expression whose value is the result of converting the str value associated with s to an int value. So if s were associated with “41” then the resulting int would be 41.**

**Answer; **int(s)

**2. Write an expression whose value is the last character in the str associated with s.**

**Answer; **s[-1]

**3. Given variables first and last, each of which is associated with a str, representing a first and a last name, respectively. Write an expression whose value is a str that is a full name of the form “Last, First”. So, if first were associated with “alan” and last with “turing”, then your expression would be “Turing,Alan”. (Note the capitalization! Note: no spaces!) And if first and last were “Florean” and “fortescue” respectively, then your expression’s value would be “Fortescue,Florean”.**

**Answer;**

# Codelab 50773 # Given variables first and last, each of which is associated with a str, # representing a first and a last name, respectively. Write an expression whose # value is a str that is a full name of the form "Last, First". # So, if first were associated with "alan" and last with "turing", # then your expression would be "Turing,Alan". ( # Note the capitalization! Note: no spaces!) # And if first and last were "Florean" and "fortescue" respectively, # then your expression's value would be "Fortescue,Florean". first = 'aLaN' last = 'tuRING' last.capitalize() + "," + first.capitalize() # Codelab 50250 # Assume there is a variable h already associated with a positive integer value. # Write the code necessary to compute the sum of the first h perfect squares, # starting with 1. # (A perfect square is an integer like 9, 16, 25, 36 that is equal to the # square of another integer (in this case 3*3, 4*4, 5*5, 6*6 respectively).) # Associate the sum you compute with the variable q. # For example, if h is 4, you would assign 30 to q because the first # 4 perfect squares (starting with 1) are: 1, 4, 9, 16 and 30==1+4+9+16. h = 4 q = 0 for k in range(1, h + 1): q = q + k**2 # Codelab 50177 # Given a variable n refers to a positive int value, # use two additional variables , k and total to write a for loop to # compute the sum of the cubes of the first n counting numbers, # and store this value in total. # Thus your code should put 1*1*1 + 2*2*2 + 3*3*3 +... + n*n*n # into total. Use no variables other than n, k, and total. n = 3 total = 0 for k in range(1,n+1): total = total + k**3 from graphics import * Win = GraphWin("CSI", 600, 400) Win.setCoords(0, 0, 60, 40) # Other reasonable coordinates: #W.setCoords(0, 0, 600, 400) #W.setCoords(0, 0, 6, 4) P = Point(60, 40) C1 = Circle(Point(30,20), 10) C2 = Circle(P, 20) C1.draw(Win) C2.draw(Win) from graphics import * Win = GraphWin("CSI", 600, 400) Win.setCoords(0, 0, 60, 40) shape = Circle(Point(30,20), 10) shape.setFill('red') shape.draw(Win) for i in range(10): p = Win.getMouse() c = shape.getCenter() dx = p.getX() - c.getX() dy = p.getY() - c.getY() shape.move(dx, dy) Win.close()

**4. Write an expression whose value is the result of converting the int value associated with x to a str. So if 582 was the int associated with x you would be converting it to the str “582”.**

**Answer; **str(x)

**5. Write an expression whose value is the str consisting of all the characters (starting with the sixth) of the str associated with s.**

**Answer; **s[5:]

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