-=

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
Send
x = 18
Autoscroll Show timestamp
Clear output
9600 baud  
Newline  

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