Golang React JS Technology Blog

Regular expression for matching HH:MM time format in Golang

Example

package main

import (
	"fmt"
	"regexp"
)

func main() {
	str1 := "8:2"
	str2 := "9:9"
	str3 := "12:29"
	str4 := "02:5"
	str5 := "23:59"
	str6 := "55:59"
	str7 := "0:01"

	re := regexp.MustCompile(`^([0-9]|0[0-9]|1[0-9]|2[0-3]):([0-9]|[0-5][0-9])$`)

	fmt.Printf("Pattern: %v\n", re.String()) // print pattern
	fmt.Printf("Time: %v\t:%v\n", str1, re.MatchString(str1))
	fmt.Printf("Time: %v\t:%v\n", str2, re.MatchString(str2))
	fmt.Printf("Time: %v\t:%v\n", str3, re.MatchString(str3))
	fmt.Printf("Time: %v\t:%v\n", str4, re.MatchString(str4))
	fmt.Printf("Time: %v\t:%v\n", str5, re.MatchString(str5))
	fmt.Printf("Time: %v\t:%v\n", str6, re.MatchString(str6))
	fmt.Printf("Time: %v\t:%v\n", str7, re.MatchString(str7))
}

Output

Pattern: ^([0-9]|0[0-9]|1[0-9]|2[0-3]):([0-9]|[0-5][0-9])$
Time: 8:2       :true
Time: 9:9       :true
Time: 12:29     :true
Time: 02:5      :true
Time: 23:59     :true
Time: 55:59     :false
Time: 0:01      :true
Most Helpful This Week
How can we reverse a simple string in Go? Convert Int data type to Int16 Int32 Int64 Split URL and Get Parameters from URL Get Year, Month, Day, Hour, Min and Second from current date and time. Example to use Weekday and YearDay function How to import structs from another package in Go?