double
     sqrt(double x);

     long double
     sqrtl(long double x);

     float
     sqrtf(float x);

DESCRIPTION

     The sqrt() function compute the non-negative square root of x.

SPECIAL VALUES

     sqrt(-0) returns -0.

     sqrt(x) returns a NaN and generates a domain error for x < 0.

SEE ALSO

     math(3)

STANDARDS

     The sqrt() function conforms to ISO/IEC 9899:1999(E).

BSD                            January 27, 2003                            BSD