Java ternary operator examples and problems to solve

1. Rewrite the following using ternary operator :

if(x%2 == 0)
c = ‘E’;
else
c = ‘O’;    

Ans:    

c = (x % 2 == 0) ? ‘E’ : ‘O’;

2. Rewrite the following program segment using the if-else statements instead of the ternary operator.

String grade = (mark >= 90) ? “A” : (mark >= 80) ? “B” : “C”;

Ans.

String grade;
if(marks >= 90) {
grade = “A”;
} else if( marks >= 80 ) {
grade = “B”;
} else {
grade = “C”;
}

3. Rewrite the following statements using ternary operator.

if(ch> “C”)
value = 200;
else
value =100;

Ans.

value = (ch> “C”) ? 200 : 100 ;

4. What is output of the above program code?

class conditional{
public static void main(String args[ ]){
int i=20;
int j= 55;
int z= 0;
z= i < j ? i : j;
System.out.printin(“The final value assigned to z = ” + z);
}
}

Ans.

The final value assigned to z= 20

5. Evaluate the value of n if the value of p=5 and q=19:

int n = (q-p)>(p-q)?(q-p):(p-q);

Ans.

n=14

Explanation:

p=5, q=16

n= (16-5) > (5-16)? (16-5) : (5-16)

= 11 > (-11) ? (14) : (-14)        [(expression) ? expressionTrue : expressinFalse;]

n= 14                               [as 11 is greater than (-11) so given expression is true.]

6. What are the values of x and y when the following statements are executed?

int a = 63, b = 36;
boolean x = (a < b ) ? true : false;
int y= (a > b ) ? a : b;

Ans.

x=false    y=63

7. Rewrite the following using ternary operator:

if (bill >10000 )
discount = bill * 10.0/100;
else
discount = bill * 5.0/100;

Ans.

discount=(bill >10000 ) ? bill * 10.0/100: bill * 5.0/100;

8. Rewrite the following program segment using the if ..else statement.

comm = (sale>15000)?sale*5/100:0;

Ans.

if (sale>15000)
comm=sale*5/100
else
comm=0;

9. Rewrite the following statement using suitable ‘if()’ statement.

int ans = res > 365 ? 180/3:90/ 3;

Ans:

int ans;
if( res > 365)
ans= 180/3;
else
ans= 90/ 3;

10. Rewrite the following statement using suitable ternary operator.

if(number > 0.0)
System.out.println(“positive”);
else
System.out.println(“not positive”);

Ans.

System.out.println( (number > 0.0) ? “positive” : “not positive”);

11. What will be the output of the following code?

char x = ‘E’ ; int m;
m=(x==’e’) ? ‘E’ : ‘e’;
System.out.println(“m=”+m);

Ans.

m= 101