Question

Okay, so I’m trying to make a very simple program in ruby and I keep running into errors. I don’t want answers directly, but I would like guidance because it’s for school and I’m not a fan of cheating. I am writing a simple program where the user puts in the length and width of their iPhone screen and then the program will multiply the area by 326. 326 is the pixels-per-inch (PPI) of the resolution, and then that value multiplied by (length x width) would give the total pixels on the screen.

What I have so far:

l = gets.to_i

w = gets.to_i

print "What is the length of the screen?"
#(dont know how to get them to enter it)

print "What is the width?"
#(same as line before dont know how to get them to enter it)

result = 326(l*w)

Thats all I have and would appreciate any help, just don’t give me the entire program, please!

Answer 1

You should print the prompt message BEFORE calling gets so the prompt message is on the screen while they are typing.

This line is incorrect:

result = 326(l*w)

Unlike in math, in Ruby you can’t just put two numbers next to each other and expect them to be multiplied. You have to use the * (asterisk) to multiply. So you will need a total of two asterisks on that line.

You should use puts at the end to print out the result.