Why variables are needed in C - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an integer variable named age.

C

int [1];

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

Aage

B5

Cmain

Dnumber

Attempts:

3 left

💡 Hint

Common Mistakes

Using a number instead of a name.

Using a reserved word like main.

Variables store data. Here, age is the name of the variable.

2fill in blank

medium

Complete the code to assign the value 10 to the variable count.

C

count [1] 10;

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

A=

B!=

C+=

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using == instead of = for assignment.

Using != which means 'not equal'.

The single equals sign = assigns a value to a variable.

3fill in blank

hard

Fix the error in the code to declare a variable named score of type integer.

C

[1] score;

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

Ainteger

Bfloat

Cint

Dchar

Attempts:

3 left

💡 Hint

Common Mistakes

Using integer instead of int.

Using float or char which are different types.

In C, int is the correct keyword for integer variables.

4fill in blank

hard

Fill both blanks to declare a variable height of type float and assign it the value 1.75.

C

[1] [2] = 1.75;

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

Afloat

Bheight

Cint

Dweight

Attempts:

3 left

💡 Hint

Common Mistakes

Using int for decimal values.

Using wrong variable names.

float declares a decimal number variable, and height is the variable name.

5fill in blank

hard

Fill all three blanks to declare an integer variable total, assign 100 to it, and then print it using printf.

C

int [1];
[2] = 100;
printf("%d\n", [3]);

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

Acount

Btotal

Dscore

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names in declaration and print.

Forgetting to declare the variable before use.

The variable total is declared, assigned, and printed. The same name is used consistently.