Ternary operator in C++ - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to assign the smaller of two numbers to min using the ternary operator.

C++

int a = 10, b = 20;
int min = (a < b) ? a : [1];

Drag options to blanks, or click blank then click option'

Ab

Ba

C10

D20

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong variable after the colon.

Forgetting the colon in the ternary operator.

The ternary operator chooses a if a < b is true; otherwise, it chooses b.

2fill in blank

medium

Complete the code to assign result to "Even" or "Odd" based on the value of num.

C++

int num = 7;
std::string result = (num % 2 == 0) ? "Even" : [1];

Drag options to blanks, or click blank then click option'

A"Odd"

B"even"

C"odd"

D"Odd number"

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase "odd" instead of "Odd".

Using a phrase like "Odd number" instead of "Odd".

If num is not divisible by 2, the ternary operator assigns "Odd" to result.

3fill in blank

hard

Fix the error in the ternary operator expression to correctly assign the absolute value of x to absVal.

C++

int x = -5;
int absVal = x >= 0 ? x [1] -x;

Drag options to blanks, or click blank then click option'

A,

B;

C?

D:

Attempts:

3 left

💡 Hint

Common Mistakes

Using a semicolon or comma instead of a colon.

Omitting the colon entirely.

The ternary operator requires a colon ':' between the true and false expressions.

4fill in blank

hard

Fill both blanks to create a ternary operator that assigns grade "Pass" if score is 50 or more, otherwise "Fail".

C++

int score = 65;
std::string grade = (score [1] 50) ? "Pass" : [2];

Drag options to blanks, or click blank then click option'

A>=

B<

C"Fail"

D"fail"

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>=' for the condition.

Using lowercase "fail" instead of "Fail".

The condition checks if score is greater than or equal to 50; if true, "Pass" is assigned, else "Fail".

5fill in blank

hard

Fill all three blanks to create a nested ternary operator that assigns category based on age: "Child" if under 13, "Teen" if 13 to 19, otherwise "Adult".

C++

int age = 15;
std::string category = (age < [1]) ? "Child" : ((age [2] 19) ? "Teen" : [3]);

Drag options to blanks, or click blank then click option'

A13

B<=

C"Adult"

D20

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong age limits or comparison operators.

Forgetting to quote the string "Adult".

The first condition checks if age is less than 13 for "Child". The nested condition checks if age is less than or equal to 19 for "Teen"; otherwise, "Adult" is assigned.