Beginners Mathematica question
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Beginners Mathematica question

[From: ] [author: ] [Date: 12-10-13] [Hit: ]
You should only get an out when you type f[3] shift enter.Go to 5:10 on Basic Calculations on this video: http://www.wolfram.Basic Calculations is on the right-hand side.......
Hi everyone,
I type the following commands in Mathematica but I don't understand why it doesn't evaluate the value of the function?

= f[x_]:=x^2 (I typed this)

Out[1]= f[x_] == x^2

=f[3] (I typed this)

Out[2]= f[3]

Meaning, it doesn't return 9. Why?
Thanks heaps!

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It shouldn't show you an output for the original function if you press shift enter; it should leave it there with green x's. You should only get an out when you type f[3] shift enter.

Go to 5:10 on "Basic Calculations" on this video: http://www.wolfram.com/broadcast/screenc…

Basic Calculations is on the right-hand side.
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