Question

It is done in python, can you please explain what does the part of the code in bold do?

print("Point should be in format (x,y)")
p1 = input("Enter point 1: ")
p2 = input("Enter point 2: ")
x1 = int(f(p1).split(",")[0])
y1 = int(f(p1).split(",")[1])
x2 = int(f(p2).split(",")[0])
y2 = int(f(p2).split(",")[1])
slope = (y2-y1)/(x2-x1)
print("Slope =",slope)

Answer 1

# i am illustrating below example using the inputs below
# 2,3  (this is entered on first line)
# 4,5  (this is entered on second line)


print("Point should be in format (x,y)")

# it reads the complete input line as string: "2,3"
p1 = input("Enter point 1: ")

# it reads the complete input line as string: "4,5"
p2 = input("Enter point 2: ")

# Now sure what is f function doing here, probably taking a string and 
# trimming the space or paranthesis at starting and space.

# Now input is in form of 2,3
# when we split it by comma, we get a list ['2', '3']
# both elements are still string.. [0] means take the first element
# so '2' in string form is picked.. The int('2') will give 2
x1 = int(f(p1).split(",")[0])
y1 = int(f(p1).split(",")[1])
x2 = int(f(p2).split(",")[0])
y2 = int(f(p2).split(",")[1])


# so, x1 = 2, y1 = 3, x2=4, y2=5

# now sloe is calculated
slope = (y2-y1)/(x2-x1)
print("Slope =",slope)