SQLite atan() Function

In SQLite, the atan() function calculates the arctangent of a number and returns the result in radians.

Syntax

atan(x)Code language: SQL (Structured Query Language) (sql)

Arguments

x

x is the number that you want to calculate the arc tangent. x can be a literal number, an expression, or a table column.

Return Type

float

The atan() function returns the arc tangent of x in radians. It returns NULL if x is NULL.

If x is a string, the atan() function will convert it to a number before calculation. If the conversation fails, the atan() function returns NULL.

Examples

The following example uses the atan() function to return the arc tan of zero:

SELECT atan(0) result;Code language: SQL (Structured Query Language) (sql)

Output:

result
------
0.0Code language: SQL (Structured Query Language) (sql)

The following example uses the atan() function to calculate the arc tangent of one:

SELECT atan(1) result;Code language: SQL (Structured Query Language) (sql)

Output:

result
------------------
0.7853981633974483Code language: SQL (Structured Query Language) (sql)

The result is in radians. If you want the result in degrees, you can use the degrees() function to convert it:

SELECT degrees(atan(1)) result;Code language: SQL (Structured Query Language) (sql)

Output:

result
------
45.0Code language: SQL (Structured Query Language) (sql)

It returns 45 degrees.