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Reference > Language > Structure > Compound operators > Decrement

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[Compound Operators]

Decrements the value of a variable by 1.

x--; // decrement x by one and returns the old value of x
--x; // decrement x by one and returns the new value of x

x: variable. Allowed data types: int, long (possibly unsigned).

The original or newly decremented value of the variable.

x = 2;
y = --x;  // x now contains 1, y contains 1
y = x--;  // x contains 0, but y still contains 1