Hi hackers!

Ive been having this little issue on this code. I'm new to programming.
If a wrong value if inputted, I want the program to run until the right value is inputted.

Kindly assist.

Java code:

package class3;

import java.util.Scanner;

public class dayName {

public static void main(String args[]){

Scanner input = new Scanner(System.in);
System.out.println("\nEnter any of the following values from 0 to 7 and \nI'll tell you the corresponding day.\n";
int day = input.nextInt();

switch (day){

case 0: day = 0;
if (day == 0)
System.out.println("\nThat would be Sunday!\n";
break;
case 1: day = 1;
if (day == 1)
System.out.println("\nThat would be Monday!\n";
break;
case 2: day = 2;
if (day == 2)
System.out.println("\nThat would be Tuesday!\n";
break;
case 3: day = 3;
if (day == 3)
System.out.println("\nThat would be Wednesday!\n";
break;
case 4: day = 4;
if (day == 4)
System.out.println("\nThat would be Thursday!\n";
break;
case 5: day = 5;
if (day == 5)
System.out.println("\nThat would be Friday!\n";
break;
case 6: day = 6;
if (day == 6)
System.out.println("\nThat would be Saturday!\n";
break;
default: if(day < 0 && day > 6);
System.out.println("\nThere's no day as such!\n";
System.exit(0);

}
}

}

Thanks

cc:

Emmach10
Dreadlord
larisoft
lekropasky
DonSegmond
codemarshal08
omoelu1

Code doesnt look good here. So send me the code to my mail. Meanwhile, you can use a do-while or while loop to run the code till the user gets the right input!

Thats simple. First of all you have to handle the exception that will occur if the user did not enter an integer then you have to validate the integer as the user enters it to make sure if its within 0 and 6 before you pass on the integer to the switch case to determine the date. This could be done with an if statement inside a while statement or with a do-while statement.

Another alternative will be to put a code snipet inside the default case that returns the user the begining of the code thanks. I could have edited the code for you but am using a poor browser that doesnt support javascript so cant select code view.

abumeinben:
Hi hackers!

Ive been having this little issue on this code. I'm new to programming.
If a wrong value if inputted, I want the program to run until the right value is inputted.

Kindly assist.

Java code:



Thanks

cc:

Emmach10
Dreadlord
larisoft
lekropasky
DonSegmond
codemarshal08
omoelu1

Input this before the switch statement.

int repeat;
do{
    if(day >=0 && <= 6){
        repeat = 0;
        }
    else{
        repeat = 1;
        input.nextLine();
        System.out.print("Wrong Input, Please try again";
        day = input.nextInt();
}
}while(repeat = 1)

abumeinben:
Hi hackers!

Ive been having this little issue on this code. I'm new to programming.
If a wrong value if inputted, I want the program to run until the right value is inputted.

Kindly assist.

Java code:



Thanks

cc:

Emmach10
Dreadlord
larisoft
lekropasky
DonSegmond
codemarshal08
omoelu1

Input this before the switch statement.

int repeat;
do{
    if(day >=0 && <= 6){
        repeat = 0;
        }
    else{
        repeat = 1;
        input.nextLine();
        System.out.print("Wrong Input, Please try again";
        day = input.nextInt();
}
}while(repeat = 1)

Emmach10:


Input this before the switch statement.

int repeat;
do{
    if(day >=0 && <= 6){
        repeat = 0;
        }
    else{
        repeat = 1;
        input.nextLine();
        System.out.print("Wrong Input, Please try again";
        day = input.nextInt();
}
}while(repeat = 1)

Will try as soon as I ..tnx

abumeinben:


Will try as soon as I ..tnx

You are welcomed.
Note: i didnt test the code so try it and modify to you own satisfaction!

thank God my name was not mentioned, trolls away silently to the backbench watching the JAVA dudes at work. . .

dhtml18:
thank God my name was not mentioned, trolls away silently to the backbench watching the JAVA dudes at work. . .

Lolzz. What languages can you program in and what are your skills?

Emmach10:


Lolzz. What languages can you program in and what are your skills?

E gba mi o / O'di egwu / osanobuame / santa maria!! See me see wahala. Okay, i ain't got a skillset other than TROLLING.

dhtml18:

E gba mi o / O'di egwu / osanobuame / santa maria!! See me see wahala. Okay, i ain't got a skillset other than TROLLING.

Lolzz, i dont mean any insult ooh!

me i just dey play play ni o

Am sorry for replying this late.
Ok...to the real business.

I can see some error here, you are already overriding the input entered by the user inside your switch statement.

int day = input.nextInt();
//loop indefinitelly
while(true){
//put your switch statement here.
Switch(day){
case 0:
System.out.print("The day is Sunday";
break;
//test other cases here....
default:
System.out.print("you haven't entered a correct value. Please Try again";
}
//then, outside your switch statement, put this,
day = input.nextInt();
//to break of this loop, simply put a condition here...e.g, if you want to break when the user enter 9.
if(day==9){
System.out.print("Thank You for using this program";
break;
}
}

lekropasky:
Am sorry for replying this late.
Ok...to the real business.

I can see some error here, you are already overriding the input entered by the user inside your switch statement.

int day = input.nextInt();
while(true){
//put your switch statement here.
Switch(day){
case 0:
System.out.print("The day is Sunday";
break;
//test other cases here....
default:
System.out.print("you haven't entered a correct value. Please Try again";
}
//then, outside your switch statement, put this,
day = input.nextInt();
}

this will definitely result to a logical error called infinite loop

This is one way of doing it

i'm just a beginner too so i'm just trying to be clever here

import java.util.Scanner;

public class Dialog {

public static void main(String args[]){
String[] days = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

int sentinelCheck = 0;
int wrongEntryCount = 0;

while(sentinelCheck==0){
	Scanner input = new Scanner(System.in);	
		if(wrongEntryCount ==0){
			System.out.println("\nPlease enter any of the following values from 0 to 6\n" );
		}
		else if(wrongEntryCount > 0 && wrongEntryCount < 3){
			System.out.println("\nMr User I expect a value from 0 to 6\n" );
		}
		else if(wrongEntryCount >= 3 && wrongEntryCount < 5 ){
			System.out.println("\n Ogbeni pick either 0 ,1, 2 , 3 , 4, 5, or 6\n" );
		}
		else{
			System.out.println("\nI'm not doing again go and die!!\n" );
			break;
		}
	int day = input.nextInt();
	if(day < 0 || day > 6){
		sentinelCheck = 0;
		wrongEntryCount++;
	}else{
		String dayOfWeek = days[day];
		System.out.printf("\nThat would be %s!\n", dayOfWeek);
		sentinelCheck = 1;
		wrongEntryCount = 0;
	}
}



}
}

yorex2011:
This is one way of doing it

i'm just a beginner too so i'm just trying to be clever here

import java.util.Scanner;

public class Dialog {

public static void main(String args[]){
String[] days = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

int sentinelCheck = 0;
int wrongEntryCount = 0;

while(sentinelCheck==0){
	Scanner input = new Scanner(System.in);	
		if(wrongEntryCount ==0){
			System.out.println("\nPlease enter any of the following values from 0 to 6\n" );
		}
		else if(wrongEntryCount > 0 && wrongEntryCount < 3){
			System.out.println("\nMr User I expect a value from 0 to 6\n" );
		}
		else if(wrongEntryCount >= 3 && wrongEntryCount < 5 ){
			System.out.println("\n Ogbeni pick either 0 ,1, 2 , 3 , 4, 5, or 6\n" );
		}
		else{
			System.out.println("\nI'm not doing again go and die!!\n" );
			break;
		}
	int day = input.nextInt();
	if(day < 0 || day > 6){
		sentinelCheck = 0;
		wrongEntryCount++;
	}else{
		String dayOfWeek = days[day];
		System.out.printf("\nThat would be %s!\n", dayOfWeek);
		sentinelCheck = 1;
		wrongEntryCount = 0;
	}
}



}
}

You are definitely learning with Java How To Program by Paul Deitel and Associates Right?

Emmach10:


You are definitely learning with Java How To Program by Paul Deitel and Associates Right?

Sentinel definitely gave me away lol

Emmach10:


this will definitely result to a logical error called infinite loop

Nope, I have not finished it. the line // day = input.nextInt(); // will cause the loop to wait for user input before continuing to the next Iteration.
see the modified version to break out of the loop