28 Numerics library [numerics]

28.7 Mathematical functions for floating-point types [c.math]

28.7.6 Mathematical special functions [sf.cmath]

28.7.6.15 Exponential integral [sf.cmath.expint]

🔗
floating-point-type expint(floating-point-type x); float expintf(float x); long double expintl(long double x);
1
#
Effects: These functions compute the exponential integral of their respective arguments x.
2
#
Returns:
where x is x.