How could I display my input function and its indefinite first integral (their graphs as outputs) ?

Tanking in consideration that I want the range for x from -100 to 100.

Thanks so much. I appreciate it.

Answer 1

[Star Strider]

The integral function is going to produce one point — the value of the entire integral. If you want to plot it, use cumtrapz:

a = 2;                                          % Input Value
b = 3;                                          % Input Value
fun = @(x) x.^2;                                % Create Function To Test Code

x = linspace(a, b);
q = cumtrapz(x,fun(x));
fprintf('\n f = %6.4f\n',q(end)-q(1))

figure(1)
plot(x, q)
grid