1 files changed, 18 insertions, 0 deletions
diff --git a/lib/std/math/complex/conj.zig b/lib/std/math/complex/conj.zig
new file mode 100644
index 0000000000..bd71ca3c06
--- /dev/null
+++ b/lib/std/math/complex/conj.zig
@@ -0,0 +1,18 @@
+const std = @import("../../std.zig");
+const testing = std.testing;
+const math = std.math;
+const cmath = math.complex;
+const Complex = cmath.Complex;
+
+/// Returns the complex conjugate of z.
+pub fn conj(z: var) Complex(@typeOf(z.re)) {
+    const T = @typeOf(z.re);
+    return Complex(T).new(z.re, -z.im);
+}
+
+test "complex.conj" {
+    const a = Complex(f32).new(5, 3);
+    const c = a.conjugate();
+
+    testing.expect(c.re == 5 and c.im == -3);
+}