Homework Sourse1 Suppose x 3 and y 2 show the output if any of the follow
1. Suppose x = 3 and y = 2; show the output, if any, of the following code. What is the output if x = 3 and y = 4? What is the output of x = 2 and y = 2?
if(x>2){
if(y>2){
z=x+y;
System.out.println(\"z is \"+z);
}
}
else
System.out.println(\"x is \"+x);
2. What is value of y after the following switch statement is executed?
x=3 ; y = 3;
swicth(x+3){
case 6:y = 1;
default:y +=1;
}
3. Use a switch statement to rewrite the following if statement
if(a==1)
x +=5;
else if (a == 2)
x +=10;
else if(a==3)
x +=16;
else if(a==4)
x +=34;
4. Use a ternary operator to rewrite the following if statement
if(x>65)
System.out.println(\"Passed\");
else
System.out.println(\"Failed\");
5. What are differences between while loop and do-while loop?
6. Convert this while loop form to do-while loop:
int i = 1;
while(i<10)
if (i%2==0)
System.out.println(i++);
7. Do these two coding have same output? Explain it!
for(int i = 0;i <10;++i){ for(int i = 0;i <10;i++){
sum += i; sum +=i;
} }
8. Is for loop equal to pre-test loop or post-test loop? Explain it!
9. Convert this for loop form to while loop:
for(inti = 1;i < 4; i++){
for(int j = 1;j < 4; j++){
if(i*j>2)
continue;
System.out.println( i * j );
}
System.out.println(i);
}
Solution
1) condition 1 - x=3,y=2:
The code written will successfully execute but will not return any output. Assigned x value is greater than 2 when the \'first if condition\' is checked, so it goes on to check whether the assigned y value which is 2 is greater than 2 for the \'second if condition\'. When the machine realises it is false the \'second if condition\' is passed, likewise the \'else condition\' too is passed resulting in no output.
condition 2 - x=3, y=4:
This condition will return an output \'z is 7\'. When the \'first if condition\' checks with the assigned x value it turns out to be true and for the \'second if condition\' too the assigned y value is also true so the codes in the \'second if condition\' block are executed. z will have an addition value of x and y which is printed with the subsequent code of the block.
condition 2 - x=2, y=2:
This condition will return an output \'x is 2\'. While compiling the \'first if condition\' the assigned x value is not greater than the condition required so the whole block passes. On which the \'else block\' becomes operational where the printing of x value is done.
