Chief Delphi - Boolean statement

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blindguyinanorg

14-02-2004 19:40

Boolean statement

simple question, in an if statement is a value of 0 = to false or to i need to say !variable==0 to get false( or variable==1). not too important it will just save me time in writing the code and i dont want to go back and have to fix it.

kiracofe8

14-02-2004 20:00

Re: Boolean statement

Quote:

Originally Posted by blindguyinanorg

int x = 0;
if (x)
//this code never executes
else
//this code always excutes

However, in C, I would consider it to be good coding practice to explicitly write the test as:

if (x == 0)
// stuff
else
// other stuff

or even

if (x != 0)
//other stuff
else
//stuff.

Ryan M.

15-02-2004 07:31

Re: Boolean statement

Just to clarify what he said, in C any non-zero value is true. Zero is false. So, if you had a variable and you wanted to test if it was zero, you could say:

Code:

    if(!variableBeingTested)

    {

            // Variable is zero

    }

    else

    {

            // Variable is not zero

    }

It is considered better form by most people, however to explicitly put in the test for zero. For example:

Code:

     if(variableBeingTested == 0)

     {

             // Variable is zero

     }

     else

     {

             // Variable is not zero

     }

--EDIT--
PS I just looked at the last post guy's name and team number and realized he's one of my team's mentors. :)

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