Question

Which of the following statements are valid?1) long num1=10; int num2=num1;2)int num1=10; long num2=num1;3)int num1=65; char x= num1;4)char x= 'a' ; int num 1= x;​

Answer 1

Answer:

2,3

Explanation:

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Answer 2

Answer:

1) long num1=10;

  int num2=num1;

It is an invalid statement.

It will give an error.

error: incompatible types: possible lossy conversion from long to int

In order to correct the statement, we need to typecast.

long num1=10;

int num2=(int)num1;

Now, it is a valid statement.

2) int num1=10;

   long num2=num1;

It is a valid statement.

3) int num1=65;

   char x= num1;

It is an invalid statement.

It will give an error.

error: incompatible types: possible lossy conversion from int to char

In order to correct the statement, we need to typecast.

int num1=65;

char x= (char)num1;

Now, it is a valid statement.

4) char x= 'a' ;

   int num 1= x;​

It is an invalid statement.

It will give an error.

error: ';' expected

error: not a statement

It is because of the invalid variable name. A variable name cannot contain any space.

In order to correct the statement, we need to remove the space between num and 1

char x= 'a' ;

int num1= x;​

Now, it is a valid statement.

So, the only valid statement is statement 2.