# Avoiding Mixed Data Type Arithmetic Expressions

Avoid mixing integer and floating-point (float, double, or long double) data in the same computation. Expressing all numbers in a floating-point arithmetic expression (assignment statement) as floating-point values eliminates the need to convert data between fixed and floating-point formats. Expressing all numbers in an integer arithmetic expression as integer values also achieves this. This improves run-time performance.

For example, assuming that `I` and `J` are both int variables, expressing a constant number (2.0) as an integer value (2) eliminates the need to convert the data. The following examples demonstrate inefficient and efficient code.

## Examples

Inefficient Code Example
    int I, J;
      I = J / 2.0
    ;

Efficient Code Example
    int I, J;
      I = J / 2;

Parent topic: Overview: Tuning Performance