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Function std.math.ldexp

Compute n * 2exp

Prototypes

real ldexp(
  real n,
  int exp
) pure nothrow @nogc @safe;

double ldexp(
  double n,
  int exp
) pure nothrow @nogc @safe;

float ldexp(
  float n,
  int exp
) pure nothrow @nogc @safe;

References

frexp

Example

import std.typetuple;
foreach(T; TypeTuple!(float, double, real))
{
    T r;

    r = ldexp(3.0L, 3);
    assert(r == 24);

    r = ldexp(cast(T)3.0, cast(int) 3);
    assert(r == 24);

    T n = 3.0;
    int exp = 3;
    r = ldexp(n, exp);
    assert(r == 24);
}

Authors

Walter Bright, Don Clugston, Conversion of CEPHES math library to D by Iain Buclaw

License

Boost License 1.0.

Comments