GO Program to check Leap year

For a better understanding of this example, we always recommend you to learn the basic topics of Golang programming listed below:

What is a leap year?

Normally a year has 365 days in the Georgian calendar. But for a leap year it has 366 days instead of 365 days, by adding February to 29 days rather than the common 28. The leap year of 366 days has 52 weeks and 2 days.

How to check Leap year?

To check whether the given year is a leap year or not, just divide the year by four and check the reminder. If the reminder is Zero then it is a leap year. For example, let us check the year ‘2020’ which is divisible by four, so it is a leap year.

How to check Leap year in the Go Program?

Here we are showing how to check leap year in the Go language. We wil make use of a variable to hold the year which has to be check. fmt.scanln() function is used to read the year to check and fmt.println() function is used to print the string on the output screen. Here the conditional statement function if ...else is used to perform the checking. 

syntax for if....else
 


if condition {
//do some instructions
}else {
//do some instructions

The check is done as  year % 4==0 && year % 100 != 0 || year % 400 == 0   in a if condition. If the condition is true it is a leap year otherwise not a leap year. >Here we are using the arithmetic operator modulus % is used to find the reminder

 

ALGORITHM

STEP 1: Import the package fmt

STEP 2: Start function main()

STEP 3: Declare the variable year 

STEP 4: Read the year year using fmt.Scanln()

STEP 5: Use if-else for the check

STEP 6: The condition for the check is  year % 4==0 && year % 100 != 0 || year % 400 == 0  

STEP 7: If the above condition is true it is a leap year otherwise not

 

GO Source Code

                                          package main
import "fmt"
func main() {
   var year int
   fmt.Print("Enter the year to be checked:")
   fmt.Scanf("%d", & year)
   if year % 4==0 && year % 100 != 0 || year % 400 == 0 {
      fmt.Println("The year is a leap year!")
   }else{
      fmt.Println("The year isn't a leap year!")
   }
}
                                      

OUTPUT

Enter the year for Leap year check = 2020
2020  is a Leap year

Enter the year for Leap year check = 1990
1990  is Not a Leap year