-=

Subtraction assignment operator.

Syntax

var_name -= sca_expr

Operands

var_name
A scalar variable.
sca_expr
A valid scalar expression.

Example

Expression Result
a -= a , where a = 2 0
a -= 3 , where a = 2 -1

Comments

The subtraction assignment operator decreases the value of var_name by sca_expr. This operator is typically used in loop constructs.

The subtraction assignment operator is not valid when used with curve-editing functions.