Int gives wrong(?) answer

function [ y ] = fn2( x, t )
t=0:0.001:1;
x=2*t;
plot(t,x,'k');
xlabel('t');
ylabel('2t')

syms x

%int(x,[0,1])

a = 1/2 * 1 * 2

y=int(x, 0, 1)
end

It keeps giving me y = 1/2, when it should be the same as a (Answer should be 1)

What am I doing wrong here?

Answer 1

[Walter Roberson]

Not 1/2 * x * 2: it is 1/2 * x^2

Answer 2

[madhan ravi]

int(x,0,1)
=> x^2/2 as Limits 
1^2/2-0/2 => 1/2 % I don‘t see any mistakes ??