-= subtracts the value of the right parameter from the left parameter and sets the left parameter to the resulting value. The left parameter should be a variable that contains a string, decimal, or integer value.

This symbol performs mathematical subtraction if both parameters contain decimal or integer values. The result will be a decimal if either parameter is a decimal value.

This symbol deletes the substring defined by th right parameter from the left parameter if either parameter is a string value. The result is a string value.

Note: If the parameter on the right hand side of the symbol is a negative literal it should be surrounded by parentheses. For example, ($var -= (-1)).

[(Variable: 'Left_Parameter') -= Right Parameter]

<?LassoScript
  (Variable: 'Left_Parameter') -= Right_Parameter;
?>

<?LassoScript
  $Left_Parameter -= Right_Parameter;
?>