Use switch case to find the number of days in a month in C

C program to find number of days in a month :

This post will show you how to find the number of days in a month in C programming language. We will use switch case to solve this problem.

Following are the steps of this program:

  • Take the month as input from the user
  • Print the days for the month and print it out

C program:

Below is the complete C program :

#include<stdio.h>

int getDays(int month){
    switch(month){
        case 1:
        case 3:
        case 5:
        case 7:
        case 8:
        case 10:
        case 12:
            return 31;
        case 4:
        case 6:
        case 9:
        case 11:
            return 30;
        default:
            return -1;
    }
}

int main(){
    int month;

    printf("Enter month in number :");
    scanf("%d",&month);

    printf("Total days : %d\n",getDays(month));
}

Explanation:

In this program:

  • We are taking the month as input from the user and storing it in the variable month.
  • getDays method is used to get the number of days for the month entered. Month should be entered in number e.g. 1 for January, 2 for February etc.
  • Inside the switch block, we are combining cases . For example, for 1,3,5,7,8,10,12 month, we have 31 days and for other months we have 30 days. So, we are clubbing them together.

Sample Output:

Enter month in number :3
31

Enter month in number :9
Total days : 30

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