use PrintErrln instead of log

2025-09-18 00:09:28 -04:00
parent 9e6f648f0b
commit 2fd9b940d5
3 changed files with 5 additions and 7 deletions
--- a/cmd/isprime.go
+++ b/cmd/isprime.go
@@ -18,7 +18,6 @@ package cmd

 import (
 	"fmt"
-	"log"
 	"math/big"

 	"github.com/spf13/cobra"
@@ -32,7 +31,7 @@ func isprime(cmd *cobra.Command, args []string) {
 	for _, s := range args {
 		_, ok := x.SetString(s, 10)
 		if !ok {
-			log.Print("invalid input " + s)
+			cmd.PrintErrln("invalid input " + s)
 			continue
 		}