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 the variable min using the ternary operator.

C

int a = 5, b = 10;
int min = (a [1] b) ? a : b;

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

A<

B>

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '>' instead of '<' will assign the larger number.

Using '==' or '!=' will not correctly compare sizes.

The ternary operator checks if 'a < b'. If true, 'min' gets 'a'; otherwise, it gets 'b'.

2fill in blank

medium

Complete the code to assign the string "even" or "odd" to result based on whether num is even or odd using the ternary operator.

C

int num = 7;
char *result = (num % 2 [1] 0) ? "odd" : "even";

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

A>

B!=

C==

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' will assign 'even' to odd numbers and vice versa.

Using '>' or '<' does not correctly check for evenness.

The condition checks if 'num % 2 != 0' to determine if the number is odd.

3fill in blank

hard

Fix the error in the ternary operator condition to correctly assign the absolute value of num to abs_val.

C

int num = -8;
int abs_val = (num [1] 0) ? -num : num;

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

A<

B!=

C==

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '>' will incorrectly negate positive numbers.

Using '==' or '!=' does not check negativity.

The condition should check if 'num < 0' to negate it and get the absolute value.

4fill in blank

hard

Fill both blanks to create a ternary operator that assigns "positive" if n is greater than zero, otherwise "non-positive".

C

int n = 3;
char *sign = (n [1] 0) ? "positive" : [2];

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

A>

B"non-positive"

C"negative"

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' in the first blank reverses the logic.

Assigning 'negative' instead of 'non-positive' changes the meaning.

The condition checks if 'n > 0'. If true, assign 'positive'; else assign 'non-positive'.

5fill in blank

hard

Fill all three blanks to create a ternary operator that assigns the maximum of x and y to max_val.

C

int x = 4, y = 9;
int max_val = (x [1] y) ? [2] : [3];

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

A>

Bx

Cy

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' reverses the logic and assigns the minimum.

Swapping 'x' and 'y' in the assignments changes the result.

The condition checks if 'x > y'. If true, 'max_val' is 'x'; otherwise, it is 'y'.