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-rw-r--r--src/pkg/math/fabs.go5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/pkg/math/fabs.go b/src/pkg/math/fabs.go
index ca78f3b59..fcddb8510 100644
--- a/src/pkg/math/fabs.go
+++ b/src/pkg/math/fabs.go
@@ -5,6 +5,11 @@
package math
// Fabs returns the absolute value of x.
+//
+// Special cases are:
+// Fabs(+Inf) = +Inf
+// Fabs(-Inf) = +Inf
+// Fabs(NaN) = NaN
func Fabs(x float64) float64 {
if x < 0 {
return -x