Question

need help with java questions

The following snippet of code would produce what outcome? public static void main(String 2 [] args) { int day = 5; switch (day) { case 1: System.out.println("Monday "); case 2: System.out.println("Tuesday "); case 3: System.out.println("Wednesday "); case 4: System.out.println("Thursday "); case 5: System.out.println("Friday "); case 6: System.out.println("Saturday "); case 7: System.out.println("Sunday "); break; default: System.out.println("Invalid Day "); } } Invalid Day Friday Saturday Sunday Invalid Day Friday Friday Saturday Sunday

Answer 1

1)code:

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public class MyClass {
public static void main(String args[]) {
int day=5;
  
switch(day){
case 1:System.out.println("Monday");
case 2:System.out.println("Tuesday");
case 3:System.out.println("Wednesday");
case 4:System.out.println("Thursday");
case 5:System.out.println("Friday");
case 6:System.out.println("Saturday");
case 7:System.out.println("Monday");break;
default:System.out.println("Invalid day");
}
}
}

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public class MyClass { public static void main(String args[]) { int day=5; 1 2- 3 4 5 6 7 8 9 10 11 12 13 14 15 16 switch(day) { case 1: System.out.println("Monday"); case 2: System.out.println("Tuesday"); case 3:System.out.println("Wednesday"); case 4:System.out.println("Thursday"); case 5:System.out.println("Friday"); case 6:System.out.println("Saturday"); case 7:System.out.println("Sunday);break; default:System.out.println("Invalid day"); } } Execute Mode, Version, Inputs & Arguments Comm JDK 11.0.4 Interactive Execute ... Result compiled and executed in 1.154 sec(s) Friday Saturday Sunday

The o/p is :

Friday

Saturday

Sunday

because , it will enter the switch with value of day as 5. So it checks for case 5, and it prints the Friday ,but since we dont have a break statement , the subsequent cases also exceuted.

so case 6 is executed and Saturday is printed. again we dont have a break statement .So it goes to next case 7 and prints Sunday.

now in case 7 we have a break statement ,so switch is exited and program stops running.

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2)program:

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public class MyClass {
public static void main(String args[]) {
  
int x=20;
int y=40;
  
if(x>10){
if(y>50){
System.out.println("Hello,Frined.");
}else{
System.out.println("GoodBye,Frined.");
}
}else{
if(y>50){
System.out.println("Hello,Enemy.");
}else{
System.out.println("GoodBye,Enemy.");
}
}
}
}

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4 1. public class MyClass { 2 public static void main(String args[]) { 3 int x=20; 5 int y=40; 6 if(x>10){ 8 if(y>50){ 9 System.out.println("Hello, Frined."); 10 }else{ 11 System.out.println("GoodBye, Frined."); 12 } 13 - }else{ 14 - if(y>50) { 15 System.out.println("Hello, Enemy."); 16 }else{ 17 System.out.println("GoodBye, Enemy."); 18 19 20 21 } > } Execute Mode Version, Inputs & Arguments Command Line Arguments JDK 11.0.4 Interactive Execute Result compiled and executed in 0.98 sec(s) GoodBye, Frined.

The O/p is GoodBye,Friend

because ,since x=20; if(x>10) -> (20>10)is true and it enters the if statement .

next if(y>50) -> (40>50) is false , so it will go to else and prints the " GoodBye Friend. "

it will not go to else of line 13 ,since we entered already the corresponding if in line 7.

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