Quick Toggle question

[aeson25]

Is there a quick one line way to toggle a value? i.e. instead of...

if(togglevalue)
   togglevalue = 0;
else
   togglevalue = 1;

Thanks!

[Faldrax]

If you are only interested in two states then you can use the bool data type, which is either true or false

bool toggle = false;
toggle = !toggle;  //toggle now is true 

[Nandor]

togglevalue=(togglevalue==1)?0:1;

[firedraco]

bool > int for this purpose...go with Faldrax's solution. If you MUST go with an int, you can do what Nandor said.

[aeson25]

huh, I've never seen notation as in Nandor's reply (specifically a colon and a question mark). Can you explain what that means?

Thanks btw.

[jsmith]

It is the ternary operator.

The algorithm

  if( condition )
     variable = value1;
  else
     variable = value2;

can be rewritten as a one-liner:

variable = condition ? value1 : value2;

However to shorten up Nandor's example even more:

togglevalue = 1 - togglevalue;

assuming togglevalue is either 0 or 1 to start with.

[Bazzy]

The ternary operator works as follows:
x ? y : z
if x is true it returns y, if not it returns z.

[aeson25]

cool beans!