# ATAN2

The ATAN2 function calculates the arctangent of y,x.

- Syntax:
`mathlib->`ATAN2 (single-number-expression, single-number-expression)- Meaning:
`mathlib->`ATAN2 (number_to_convert)- Returns:
- A single number item

The ATAN2 function calculates the arctangent of y,x.

- Syntax:
`mathlib->`ATAN2 (single-number-expression, single-number-expression)- Meaning:
`mathlib->`ATAN2 (number_to_convert)- Returns:
- A single number item