Whys isn't this if working?

I have this code:

if intervalo & quant == 0 %Caso seja um número
       intervalo = str2num(nome);
       quant = 1; 
end

But, it isn't working. When this condicion is true, it doesn't work.

I'm using the '&' because I need to analyze vectores. Sometimes, intervalo is vectors, so I need to use that.

Thanks by the attention.

[Daniel Fonsêca]

I changed the value to 1, i say:

if intervalo & quant == 1 %Caso seja um número
       intervalo = str2num(nome);
       quant = 1;
end

And it worked. Why?

Answer 1

[Stephan]

Hi,

consider:

>> intervalo = 0

intervalo =

     0

>> quant = 0

quant =

     0

Now case 1 - what you told Matlab to check:

>> intervalo & quant == 0

ans =

  logical

   0

Now the way what you problably wanted Matlab to do:

>> intervalo == 0 & quant == 0

ans =

  logical

   1

In other words:

If you write it the way you dit, it is the short way to write:

   intervalo == 1 & quant == 0

is the same as:

    intervalo & quant == 0

You got it?

Best regards

Stephan