Switch Case

Switch Case

Beginner Problems Language Basics Easy

Given the integer day denoting the day number, print on the screen which day of the week it is. Week starts from Monday and for values greater than 7 or less than 1, print Invalid.

Ensure only the 1^st letter of the answer is capitalised.

For printing use:-

for C++ : cout << variable_name;
for Java : System.out.print();
for Python : print()
for Javascript : console.log()

Examples:

Input: day = 3

Output: Wednesday

Input: day = 8

Output: Invalid

Input: day = 2

Constraints

0 <= day <= 50

Company Tags

TCS Cognizant Accenture Infosys Capgemini Wipro IBM HCL Tech Mahindra MindTree

Editorial

Approach:

Receive Input: Capture the integer input day from the user.
If the day is less than 1 or greater than 7, print "Invalid".
Otherwise, use a switch statement or if-else ladder to print the corresponding day of the week based on the day value.

Note:

In Python, there is no direct switch-case construct like in other programming languages. Therefore, an if-else ladder is used for the code.

Solution:

#include <bits/stdc++.h>
using namespace std;

class Solution {
public:
    /* Function to determine the day of
    the week based on day number */
    void whichWeekDay(int day) {
        // Check if the day number is valid
        if (day < 1 || day > 7) {
            cout << "Invalid";
            return;
        }

        // Print the corresponding day of the week
        switch (day) {
            case 1: cout << "Monday"; break;
            case 2: cout << "Tuesday"; break;
            case 3: cout << "Wednesday"; break;
            case 4: cout << "Thursday"; break;
            case 5: cout << "Friday"; break;
            case 6: cout << "Saturday"; break;
            case 7: cout << "Sunday"; break;
        }
    }
};

int main() {
    // Creating an instance of Solution class
    Solution sol;
    
    int day;
    // Taking user input
    cout << "Enter the day number: ";
    cin >> day;
    
    /* Function call to determine the day of
    the week based on day number */
    sol.whichWeekDay(day);
    return 0;
}
import java.util.Scanner;

class Solution {
    /* Function to determine the day of 
    the week based on day number */
    public void whichWeekDay(int day) {
        // Check if the day number is valid
        if (day < 1 || day > 7) {
            System.out.print("Invalid");
            return;
        }

        // Print the corresponding day of the week
        switch (day) {
            case 1: System.out.print("Monday"); break;
            case 2: System.out.print("Tuesday"); break;
            case 3: System.out.print("Wednesday"); break;
            case 4: System.out.print("Thursday"); break;
            case 5: System.out.print("Friday"); break;
            case 6: System.out.print("Saturday"); break;
            case 7: System.out.print("Sunday"); break;
        }
    }
}

class Main {
    public static void main(String[] args) {
        // Creating an instance of Solution class
        Solution sol = new Solution();
        
        Scanner scanner = new Scanner(System.in);
        int day;
        // Taking user input
        System.out.print("Enter the day number: ");
        day = scanner.nextInt();
        
        /* Function call to determine the day 
        of the week based on day number */
        sol.whichWeekDay(day);
    }
}
class Solution:
    # Function to determine the day of 
    # the week based on day number
    def whichWeekDay(self, day):
        # Check if the day number is valid
        if day < 1 or day > 7:
            print("Invalid")
            return

        # Print the corresponding day of the week
        if day == 1: print("Monday")
        elif day == 2: print("Tuesday")
        elif day == 3: print("Wednesday")
        elif day == 4: print("Thursday")
        elif day == 5: print("Friday")
        elif day == 6: print("Saturday")
        elif day == 7: print("Sunday")

# Creating an instance of Solution class
sol = Solution()

# Taking user input
day = int(input("Enter the day number: "))

# Function call to determine the day 
# of the week based on day number
sol.whichWeekDay(day)
class Solution {
    /* Function to determine the day of
    the week based on day number */
    whichWeekDay(day) {
        // Check if the day number is valid
        if (day < 1 || day > 7) {
            console.log("Invalid");
            return;
        }

        // Print the corresponding day of the week
        switch (day) {
            case 1: console.log("Monday"); break;
            case 2: console.log("Tuesday"); break;
            case 3: console.log("Wednesday"); break;
            case 4: console.log("Thursday"); break;
            case 5: console.log("Friday"); break;
            case 6: console.log("Saturday"); break;
            case 7: console.log("Sunday"); break;
        }
    }
}

// Creating an instance of Solution class
const sol = new Solution();

const readline = require('readline');

// Setting up readline interface for input
const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});

// Taking user input
rl.question("Enter the day number: ", function(day) {
    /* Function call to determine the day 
    of the week based on day number */
    sol.whichWeekDay(parseInt(day));
    rl.close();
});

Complexity Analysis:

Time Complexity: O(1), The operations of receiving input and printing output are executed once regardless of the size of the input.
Space Complexity: O(1), We only store a single integer in the day variable, and no additional space is used that grows with the input size.

Code

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