use Math::GSL::Machine qw/:all/;
print "The GSL_DBL_EPSILON Constant is $GSL_DBL_EPSILON\n";
Here is a list of all the constants included in this module :
• $GSL_DBL_EPSILON
• $GSL_SQRT_DBL_EPSILON
• $GSL_ROOT3_DBL_EPSILON
• $GSL_ROOT4_DBL_EPSILON
• $GSL_ROOT5_DBL_EPSILON
• $GSL_ROOT6_DBL_EPSILON
• $GSL_LOG_DBL_EPSILON
• $GSL_DBL_MIN
• $GSL_SQRT_DBL_MIN
• $GSL_ROOT3_DBL_MIN
• $GSL_ROOT4_DBL_MIN
• $GSL_ROOT5_DBL_MIN
• $GSL_ROOT6_DBL_MIN
• $GSL_LOG_DBL_MIN
• $GSL_DBL_MAX
• $GSL_SQRT_DBL_MAX
• $GSL_ROOT3_DBL_MAX
• $GSL_ROOT4_DBL_MAX
• $GSL_ROOT5_DBL_MAX
• $GSL_ROOT6_DBL_MAX
• $GSL_LOG_DBL_MAX
• $GSL_FLT_EPSILON
• $GSL_SQRT_FLT_EPSILON
• $GSL_ROOT3_FLT_EPSILON
• $GSL_ROOT4_FLT_EPSILON
• $GSL_ROOT5_FLT_EPSILON
• $GSL_ROOT6_FLT_EPSILON
• $GSL_LOG_FLT_EPSILON
• $GSL_FLT_MIN
• $GSL_SQRT_FLT_MIN
• $GSL_ROOT3_FLT_MIN
• $GSL_ROOT4_FLT_MIN
• $GSL_ROOT5_FLT_MIN
• $GSL_ROOT6_FLT_MIN
• $GSL_LOG_FLT_MIN
• $GSL_FLT_MAX
• $GSL_SQRT_FLT_MAX
• $GSL_ROOT3_FLT_MAX
• $GSL_ROOT4_FLT_MAX
• $GSL_ROOT5_FLT_MAX
• $GSL_ROOT6_FLT_MAX
• $GSL_LOG_FLT_MAX
• $GSL_SFLT_EPSILON
• $GSL_SQRT_SFLT_EPSILON
• $GSL_ROOT3_SFLT_EPSILON
• $GSL_ROOT4_SFLT_EPSILON
• $GSL_ROOT5_SFLT_EPSILON
• $GSL_ROOT6_SFLT_EPSILON
• $GSL_LOG_SFLT_EPSILON
• $GSL_MACH_EPS
• $GSL_SQRT_MACH_EPS
• $GSL_ROOT3_MACH_EPS
• $GSL_ROOT4_MACH_EPS
• $GSL_ROOT5_MACH_EPS
• $GSL_ROOT6_MACH_EPS
• $GSL_LOG_MACH_EPS