Math Is Fun Forum

I'm getting 86 with the algebra solver you linked.

Sorry about my previous post. I subbed into the equivalent expression Wolfram Alpha came up with instead of the original. I don't see any reason the answer should be different though.

Why don't you show your working, Allo?

The brackets just make it clear which part of the sentence you want the "for all" quantifier to apply. In larger sentences you might want to quantify

The 'v' and upside-down 'v' you're talking about sound like the symbols for logical disjunction

http://en.wikipedia.org/wiki/List_of_ma … al_symbols

(Scroll down about half way for the dis- and conjunction symbols.)

This is hilarious!

I think they were getting confused not only with dollars and cents, but with kilobytes and kilobits.

If you mean to say that zero is neither positive nor negative, you're absolutely correct. But '-0' isn't the same as saying 'zero is negative'!

To see why 0 is the same as -0 and +0, imagine +1, +2, and so on, as a line starting from zero, like this:

A negative number is the same as a positive number, except you reverse the line. It's Stays the same length and still starts at zero, but it's flipped. For example, -2 looks like this:

You can imagine "flipping the line" with numbers closer and closer to zero (shorter and shorter lines). But what happens when your line gets so short that it doesn't really have length? (You could say "0 length").

By that stage, you don't really have a line anymore. You have a point which represents zero:

Because it doesn't have any length "flipping" it doesn't change it, so +0 is the same as -0.

Here's your main problem:

ElseIf
test2 = TextWindow.Read()
If test2 = "Testing Reply 2" Then

You need to put your test on the same line as the 'ElseIf' like this:

ElseIf test2 = TextWindow.Read()
If test2 = "Testing Reply 2" Then

And immediately after the test, Small Basic is expecting a "Then," just like with the if statements:

ElseIf test2 = TextWindow.Read() Then
If test2 = "Testing Reply 2" Then

Also, you can't test if TextWindow.Read() is equal to the variable 'test2' because you haven't set it to anything yet. But you already set the "test" variable to TextWindow.Read() on the second line of your program. What I think you meant to do is something like this:

ElseIf test = "Testing Reply 2" Then

Finally, with all that thinking, we get this:

TextWindow.WriteLine("Testing")
test = TextWindow.Read()
If test = "Testing Reply" Then
	TextWindow.WriteLine("This is text.")
ElseIf test = "Testing Reply 2" Then
	TextWindow.WriteLine("This is also text.")
Else
	TextWindow.WriteLine("Sorry, this operation did not perform correctly.")
EndIf

Line by line, the program says this:
1. Show the user "Testing" (print it out on the screen).
2. Set the variable "test" to whatever the user types.
3. Check if the "test" variable is equal to "Testing Reply" (without quotes). If it is, go to step 4, otherwise go to step 5.
4. Show the user "This is text." (Without quotes, of course!) Then go to step 8.
5. Check if the "test" variable is equal to "Testing Reply 2" (without quotes). If it is, go to step 6, otherwise go to step 7.
6. Show the user "This is also text." Then go to step 8.
7. Show the user "Sorry, this operation did not perform correctly." Then go to step 8.
8. This is the "EndIf." It pretty much says "quit asking all these 'if' questions!"

I could only figure out that there's at least

I don't think they got it from line 3. With or without that term, the statement is the same:

This is because

36

16

It's a rimshot sound. I'd post a link, though I'm not an established member yet. Just Google it and listen to a Youtube video.

Nah, come on! It's an easy mistake to make. Keep going!