To define a function is to establish a link, a relation between a first set and another set.
In mathematics, a function allows defining a result (most often numerical) for each value of a set called a domain.
Definition of fonction
We talk about image and argument. A number has a unique image, but a number can have several arguments.
Here the argument is the input data, and the image is the returned result.
Association of colors
Code
python1def area(x):
2 return 2 * x
3
4print(area(4))
5
6x = np.linspace(-6,6)
7f = x*2
8
9plt.plot(x,f,label='f')
10
11plt.axis([0,6,0,6])
12plt.grid()
13plt.legend()
14
15plt.title('Function',fontsize=12)
16plt.savefig('function', bbox_inches='tight')Time complexity : linear
Formula
A function in mathematics allows defining a result for each value of a set called a domain.
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