come on really? whats wrong with this?
You need to assign your answer to the output variable tf.
Test  Status  Code Input and Output 

1  Fail 
n = 1;
ans_correct = true;
assert(isequal(is_it_odd(n),ans_correct))
true

2  Fail 
n = 2;
ans_correct = false;
assert(isequal(is_it_odd(n),ans_correct))
false

3  Fail 
n = 28;
ans_correct = false;
assert(isequal(is_it_odd(n),ans_correct))
false

4  Fail 
n = 453;
ans_correct = true;
assert(isequal(is_it_odd(n),ans_correct))
true

5  Fail 
n = 17;
ans_correct = true;
assert(isequal(is_it_odd(n),ans_correct))
true

6  Fail 
n = 16;
ans_correct = false;
assert(isequal(is_it_odd(n),ans_correct))
false

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