Ads by ArduinoGetStarted.com
-=
Description
This is a convenient shorthand to perform subtraction of a constant or a variable from a variable.
Syntax
x -= y; // equivalent to the expression x = x - y;
Parameter Values
- x: variable. Allowed data types: int, float, double, byte, short, long.
- y: variable or constant. Allowed data types: int, float, double, byte, short, long.
Example Code
void setup() {
Serial.begin(9600);
int x = 20;
x -= 2; // x now contains 18
Serial.print("x = ");
Serial.println(x);
}
void loop() {
}
The result on Serial Monitor:
COM6
x = 18
Autoscroll
Clear output
9600 baud
Newline
See Also
- Language : += (compound addition)
- Language : &= (compound bitwise and)
- Language : |= (compound bitwise or)
- Language : ^= (compound bitwise xor)
- Language : /= (compound division)
- Language : *= (compound multiplication)
- Language : %= (compound remainder)
- Language : -- (decrement)
- Language : ++ (increment)
- Language : Normal Subtraction
※ ARDUINO BUY RECOMMENDATION
| Arduino UNO R3 | |
| Arduino Starter Kit |
Please note: These are Amazon affiliate links. If you buy the components through these links, We will get a commission at no extra cost to you. We appreciate it.