Often called ternary operators. A really handy way to write condensate and yet easily readable code in C is using one line if when doing only simple operation in the if.

Two syntax exists one with an integrated else:

(CONDITION) ? TRUE: FALSE;

syntax1.c

(Variable > Threshold) ? Variable-- : Variable++;

And a simple if,

if (CONDITION) TRUE;

syntax2.c

if (Variable < 0) Variable = 0;