Hello, I would like to ask a really easy question:
How can I substitute a variable into an equation and have it evaluated simultaneously? If I have $f = a + b$ and would it to return $5$ if $a=2$ and $b=3$, how shall I proceed?
I've tried the following
a, b = var('a, b');
f = a + b;
a = 2; b = 3; f
But it returned a+b, which is not what I had in mind. Thanks for the help in advance!
You can use:
f (x,y)=x+y
a = 2; b = 3
f(a,b)
In this way you obtain 5, the desired result. Actually you don't need x and y, you could use only a and b, but I put different names just to underline the mechanism. The first line defines the function f with generic variables. The last line calculates the value of f when you actually pass the values of the variables. It can be a bit confusing at first, I hope my example can help.
Asked: 2014-04-16 06:47:55 +0100
Seen: 603 times
Last updated: Apr 16 '14
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