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#### 9.31.7 Math Builtins

The following built-in functions may be used to generate a floating-point value. All return a floating-point value except `\$cvi', `\$int', and `\$sgn', which return an integer value.

`\$acos(`expr`)`
Returns the floating point arccosine of expr.

`\$asin(`expr`)`
Returns the floating point arcsine of expr.

`\$atan(`expr`)`
Returns the floating point arctangent of expr.

`\$atan2(`expr1`,`expr2`)`
Returns the floating point arctangent of expr1 / expr2.

`\$ceil(`expr`)`
Returns the smallest integer not less than expr as floating point.

`\$cosh(`expr`)`
Returns the floating point hyperbolic cosine of expr.

`\$cos(`expr`)`
Returns the floating point cosine of expr.

`\$cvf(`expr`)`
Returns the integer value expr converted to floating-point.

`\$cvi(`expr`)`
Returns the floating point value expr converted to integer.

`\$exp(`expr`)`
Returns the floating point value e ^ expr.

`\$fabs(`expr`)`
Returns the floating point absolute value of expr.

`\$floor(`expr`)`
Returns the largest integer that is not greater than expr as floating point.

`\$fmod(`expr1`,`expr2`)`
Returns the floating point remainder of expr1 / expr2.

`\$int(`expr`)`
Returns 1 if expr evaluates to an integer, zero otherwise.

`\$ldexp(`expr1`,`expr2`)`
Returns the floating point value expr1 * 2 ^ expr2.

`\$log10(`expr`)`
Returns the base 10 logarithm of expr.

`\$log(`expr`)`
Returns the natural logarithm of expr.

`\$max(`expr1`,`expr2`)`
Returns the floating point maximum of expr1 and expr2.

`\$min(`expr1`,`expr2`)`
Returns the floating point minimum of expr1 and expr2.

`\$pow(`expr1`,`expr2`)`
Returns the floating point value expr1 ^ expr2.

`\$round(`expr`)`
Returns the nearest integer to expr as a floating point number.

`\$sgn(`expr`)`
Returns -1, 0, or 1 based on the sign of expr.

`\$sin(`expr`)`
Returns the floating point sine of expr.

`\$sinh(`expr`)`
Returns the floating point hyperbolic sine of expr.

`\$sqrt(`expr`)`
Returns the floating point square root of expr.

`\$tan(`expr`)`
Returns the floating point tangent of expr.

`\$tanh(`expr`)`
Returns the floating point hyperbolic tangent of expr.

`\$trunc(`expr`)`
Returns the integer value of expr truncated towards zero as floating point.