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Defining a variable and a Root object in Mathematica

Cédric Cavents, Student

Posted 8 years ago

Hello! I have two really basic questions Question1 I'm using the online Mathematica version (as you can see on the picture). Now, I don't know why, but Mathematica doest not define variables properly? As it is clear from the screenshot, when I type as input: x = 4, then Mathematica returns the function x = 4, instead of just remembering x as 4. Furthermore, when giving x^2+1 as input, Mathematica returns its roots? Where does this come from? How can I undo it? Question2 I just want Mathematica do display the first root of $x^2-2x+1$, but it clearly does not seem to understand it? How can I define such root objects? Thanks in advance!

POSTED BY: Cédric Cavents

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Posted 8 years ago

Thank you for the answers! This really helps me a lot.

POSTED BY: Cédric Cavents

Posted 8 years ago

Otherwise, use the menu Evaluation > Evaluate cells

POSTED BY: Gianluca Gorni

Posted 8 years ago

If you precede your input with the orange boxed "=" symbol, your input will be "interpreted" by Wolfram\|Alpha. If you mean your input as regular Wolfram Language, do not type "=" at the beginning of the line.

POSTED BY: Gianluca Gorni

Posted 8 years ago

That was the first thing I tried, but when I just type (for instance) x = 4 without using the symbol '=' then I don't get the typical in[3]:= x = 4 out I assume you mean this: but Mathematica does not remember the values this way? I know its a really silly question but its just some kind of setting that I do not know, since I always used '=' beforehand.