GLib.Math

Description:

Binding to the C standard library's maths functions

When compiling binary output with valac and some libc implementations, such as GNU's libc, you will need to pass through the math library linker flags, -lm, if a function is not found. For example:

valac -X -lm my_maths_program.vala

Content:

Constants:

public const double E
The base of natural logarithms.
public const double LN10
public const double LN2
public const double LOG_2_BASE_10
public const double PI
The value of pi (ratio of circle's circumference to its diameter).
public const double PI_2
public const double PI_4
public const double SQRT2

Functions:

public double acos (double x)
Calculates the arc cosine of x.
public float acosf (float x)
Calculates the arc cosine of x.
public double acosh (double x)
Calculates the inverse hyperbolic cosine of x.
public float acoshf (float x)
Calculates the inverse hyperbolic cosine of x.
public double asin (double x)
Calculates the arc sine of x.
public float asinf (float x)
Calculates the arc sine of x.
public double asinh (double x)
Returns the inverse hyperbolic sine of x, that is the value whose hyperbolic sine is x.
public float asinhf (float x)
Returns the inverse hyperbolic sine of x, that is the value whose hyperbolic sine is x.
public double atan (double x)
Calculates the arc tangent of x.
public double atan2 (double y, double x)
Calculates the arc tangent of the two variables x and y.
public float atan2f (float y, float x)
Calculates the arc tangent of the two variables x and y.
public float atanf (float x)
Calculates the arc tangent of x.
public double atanh (double x)
Returns the inverse hyperbolic tangent of x.
public float atanhf (float x)
Returns the inverse hyperbolic tangent of x.
public double cbrt (double x)
Returns the (real) cube root of x.
public float cbrtf (float x)
Returns the (real) cube root of x.
public double ceil (double x)
Rounds x up to the nearest integer.
public float ceilf (float x)
Rounds x up to the nearest integer.
public double copysign (double x, double y)
Returns a value whose absolute value matches that of x, but whose sign bit matches that of y.
public float copysignf (float x, float y)
Returns a value whose absolute value matches that of x, but whose sign bit matches that of y.
public double cos (double x)
Returns the cosine of x.
public float cosf (float x)
Returns the cosine of x.
public double cosh (double x)
Returns the hyperbolic cosine of x.
public float coshf (float x)
Returns the hyperbolic cosine of x.
public double drem (double x, double y)
Computes the remainder of dividing x by y.
public float dremf (float x, float y)
Computes the remainder of dividing x by y.
public double erf (double x0)
Returns the error function of x0.
public double erfc (double x0)
Returns the complementary error function of x0, that is 1.0 - erf(x0).
public float erfcf (float x0)
Returns the complementary error function of x0, that is 1.0 - erf(x0).
public float erff (float x0)
Returns the error function of x0.
public double exp (double x)
Returns the value of the base of natural logarithms raised to the power of x.
public double exp10 (double x)
Returns the value of 10 raised to the power of x.
public float exp10f (float x)
Returns the value of 10 raised to the power of x.
public double exp2 (double x)
Returns the value of 2 raised to the power of x.
public float exp2f (float x)
Returns the value of 2 raised to the power of x.
public float expf (float x)
Returns the value of the base of natural logarithms raised to the power of x.
public double expm1 (double x)
Returns a value equivalent to exp(x) - 1.
public float expm1f (float x)
Returns a value equivalent to exp(x) - 1.
public double fabs (double x)
Returns the absolute value.
public float fabsf (float x)
Returns the absolute value.
public double fdim (double x, double y)
Returns max(x - y, 0).
public float fdimf (float x, float y)
Returns max(x - y, 0).
public int finite (double value)
Returns the value of not-a-number (NaN) checking.
public int finitef (float value)
Returns the value of not-a-number ( float.NAN) checking.
public double floor (double x)
Rounds x down to the nearest integer.
public float floorf (float x)
Rounds x down to the nearest integer.
public double fma (double x, double y, double z)
Computes x * y + z.
public float fmaf (float x, float y, float z)
Computes x * y + z.
public double fmax (double x, double y)
Returns the larger value of x and y.
public float fmaxf (float x, float y)
Returns the larger value of x and y.
public double fmin (double x, double y)
Returns the smaller value of x and y.
public float fminf (float x, float y)
Returns the smaller value of x and y.
public double fmod (double x, double y)
Computes the remainder of dividing x by y.
public float fmodf (float x, float y)
Computes the remainder of dividing x by y.
public double frexp (double x, out int exponent)
Split the number x into a normalized fraction and an exponent.
public float frexpf (float x, out int exponent)
Split the number x into a normalized fraction and an exponent.
public double gamma (double x0)
Computes the natural logarithm of the Gamma function.
public float gammaf (float x0)
Computes the natural logarithm of the Gamma function.
public double hypot (double x, double y)
Returns the length of the hypotenuse of a right-angle triangle with sides of length x and y, or the distance of the point (x,y) from the origin.
public float hypotf (float x, float y)
Returns the length of the hypotenuse of a right-angle triangle.
public int ilogb (double x)
Returns the exponent part of their argument as a signed integer.
public int ilogbf (float x)
Returns the exponent part of their argument as a signed integer.
public int isinf (double value)
public int isinff (float value)
Returns the value of infinity checking.
public int isnan (double value)
public int isnanf (float value)
Returns a non-zero value if value is not-a-number ( float.NAN).
public double j0 (double x0)
Returns Bessel function of x0 of the first kind of order 0.
public float j0f (float x0)
Returns Bessel function of x0 of the first kind of order 0.
public double j1 (double x0)
Returns Bessel function of x0 of the first kind of order 1.
public float j1f (float x0)
Returns Bessel function of x0 of the first kind of order 1.
public double jn (int x0, double x1)
Returns Bessel function of x of the first kind of order n.
public float jnf (int x0, float x1)
Returns Bessel function of x of the first kind of order n.
public double ldexp (double x, int exponent)
Returns the result of multiplying the floating-point number x by 2 raised to the power exponent.
public float ldexpf (float x, int exponent)
Returns the result of multiplying the floating-point number x by 2 raised to the power exponent.
public double lgamma (double x0)
Returns the natural logarithm of the absolute value of the Gamma function.
public double lgamma_r (double x0, out int signgamp)
Returns the natural logarithm of the absolute value of the Gamma function.
public float lgamma_rf (float x0, out int signgamp)
Returns the natural logarithm of the absolute value of the Gamma function.
public float lgammaf (float x0)
Returns the natural logarithm of the absolute value of the Gamma function.
public int64 llrint (double x)
Rounds it's argument to the nearest integer value, using the current rounding direction.
public int64 llrintf (float x)
Rounds it's argument to the nearest integer value, using the current rounding direction.
public int64 llround (double x)
Rounds it's argument to the nearest integer value, rounding away from zero, regardless of the current rounding direction.
public int64 llroundf (float x)
Rounds it's argument to the nearest integer value, rounding away from zero, regardless of the current rounding direction.
public double log (double x)
Returns the natural logarithm of x.
public double log10 (double x)
Returns the base 10 logarithm of x.
public float log10f (float x)
Returns the base 10 logarithm of x.
public double log1p (double x)
Returns a value equivalent to log(1 + x).
public float log1pf (float x)
Returns a value equivalent to log(1 + x).
public double log2 (double x)
Returns the base 2 logarithm of x.
public float log2f (float x)
Returns the base 2 logarithm of x.
public double logb (double x)
Extracts the exponent of x and returns it as a floating-point value.
public float logbf (float x)
Extracts the exponent of x and returns it as a floating-point value.
public float logf (float x)
Returns the natural logarithm of x.
public long lrint (double x)
Rounds it's argument to the nearest integer value, using the current rounding direction.
public long lrintf (float x)
Rounds it's argument to the nearest integer value, using the current rounding direction.
public long lround (double x)
Rounds it's argument to the nearest integer value, rounding away from zero, regardless of the current rounding direction.
public long lroundf (float x)
Rounds it's argument to the nearest integer value, rounding away from zero, regardless of the current rounding direction.
public double modf (double x, out double iptr)
Breaks the argument x into an integral part and a fractional part, each of which has the same sign as x.
public float modff (float x, out float iptr)
Breaks the argument x into an integral part and a fractional part. each of which has the same sign as x.
public double nan (string tagb)
Returns a representation (determined by tagb) of a quiet double.NAN.
public float nanf (string tagb)
Returns a representation (determined by tag) of a quiet float.NAN.
public double nearbyint (double x)
Rounds argument x to an integer value in floating point format, using the current rounding direction and without raising the inexact exception.
public float nearbyintf (float x)
Rounds argument x to an integer value in floating point format, using the current rounding direction and without raising the inexact exception.
public double nextafter (double x, double y)
Returns the next representable neighbor of x in the direction towards y.
public float nextafterf (float x, float y)
Returns the next representable neighbor of x in the direction towards y.
public double nexttoward (double x, double y)
public float nexttowardf (float x, double y)
public double pow (double x, double y)
Returns the value of x raised to the power of y.
public double pow10 (double x)
Returns the value of 10 raised to the power of x.
public float pow10f (float x)
Returns the value of 10 raised to the power of x.
public float powf (float x, float y)
Returns the value of x raised to the power of y.
public double remainder (double x, double y)
Computes the remainder of dividing x by y.
public float remainderf (float x, float y)
Computes the remainder of dividing x by y.
public double remquo (double x, double y, out int quo)
Computes the remainder and part of the quotient upon division of x by y.
public float remquof (float x, float y, out int quo)
Computes the remainder and part of the quotient upon division of x by y.
public double rint (double x)
Rounds it's argument to an integer value in floating point format, using the current rounding direction and with raising the inexact exception.
public float rintf (float x)
Rounds it's argument to an integer value in floating point format. using the current rounding direction and with raising the inexact exception.
public double round (double x)
Rounds argument x to the nearest integer, but round halfway cases away from zero, (regardless of the current rounding direction), instead of to the nearest even integer like rint.
public float roundf (float x)
Rounds argument x to the nearest integer, but round halfway cases away from zero (regardless of the current rounding direction), instead of to the nearest even integer like rint.
public double scalb (double x, double n)
Multiplies x by 2 to the power n.
public float scalbf (float x, float n)
Multiplies x by 2 to the power n.
public double scalbln (double x, long n)
This function is equivalent to GLib.Math.ldexp.
public float scalblnf (float x, long n)
This function is equivalent to Math.ldexp.
public double scalbn (double x, int n)
Multiplies it's first argument x by 2 to the power n.
public float scalbnf (float x, int n)
Multiplies it's first argument x by 2 to the power n.
public double significand (double x)
Returns the mantissa of x scaled to the range [1,2].
public float significandf (float x)
Returns the mantissa of x scaled to the range [1,2].
public double sin (double x)
Returns the sine of x.
public void sincos (double x, out double sinx, out double cosx)
computes both sine and cosine of x at the same time.
public void sincosf (float x, out float sinx, out float cosx)
Computes both sine and cosine of x at the same time.
public float sinf (float x)
Returns the sine of x, where x is given in radians.
public double sinh (double x)
Returns the hyperbolic sine of x.
public float sinhf (float x)
returns the hyperbolic sine of x.
public double sqrt (double x)
Returns the non-negative square root of x.
public float sqrtf (float x)
Returns the non-negative square root of x.
public double tan (double x)
Returns the tangent of x, where x is given in radians.
public float tanf (float x)
Returns the tangent of x.
public double tanh (double x)
returns the hyperbolic tangent of x.
public float tanhf (float x)
Returns the hyperbolic tangent of x.
public double tgamma (double x0)
Returns the value of Gamma function for the argument x0.
public float tgammaf (float x0)
Returns the value of Gamma function for the argument x0.
public double trunc (double x)
Rounds argument x to the nearest integer not larger in absolute value.
public float truncf (float x)
Rounds argument x to the nearest integer not larger in absolute value.
public double y0 (double x0)
Returns Bessel function of x0 of the second kind of order 0.
public float y0f (float x0)
Returns Bessel function of x0 of the second kind of order 0.
public double y1 (double x0)
Returns Bessel function of x0 of the second kind of order 1.
public float y1f (float x0)
Returns Bessel function of x0 of the second kind of order 1.
public double yn (int x0, double x1)
Returns Bessel function of x1 of the second kind of order x0.
public float ynf (int x0, float x1)
Returns Bessel function of x1 of the second kind of order x0.