for loops and the if statement

This is a beginner question im sure i just dont understand why is it that i have to use 2 equal signs in the if statement?

    for n=0:10; 
    fprintf('n=%d\n',n);
    if n==0

i cannot use n=0 ??

thanks BN

Answer 1

[bym]

n=0

Is an assignment; it assigns the value 0 to the variable n

n==0

is a logical test; it tests whether the variable n is equal to 0 and returns a boolean (true/false)

Answer 2

[sourav malla]

If you are assigning something inside the loop then its:

z=0;

And if you are checking a statement for true or false then:

z==0;

basically it will return logical 1 or 0 based upon 'true' or 'false' in matlab.