Storage size overview in C - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a variable that uses 1 byte of storage.

C

unsigned char [1] = 255;

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

Ax

Ba

Cvar1

DbyteVar

Attempts:

3 left

💡 Hint

Common Mistakes

Using int which usually uses 4 bytes.

Using variable names that are not descriptive.

The unsigned char type uses 1 byte of storage. Naming the variable byteVar is clear and descriptive.

2fill in blank

medium

Complete the code to declare a variable that uses 4 bytes of storage.

C

int [1] = 1000;

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Avalue

Bcount

Cnum

Dtotal

Attempts:

3 left

💡 Hint

Common Mistakes

Using char which uses 1 byte.

Using variable names that are too generic.

The int type typically uses 4 bytes on modern systems. Naming the variable num is simple and clear.

3fill in blank

hard

Fix the error in the code to correctly declare a 2-byte storage variable.

C

short [1] = 32000;

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AshortVar

Bsh

Cs

DvarShort

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable names that are too short or unclear.

Confusing short with int.

The short type usually uses 2 bytes. Naming the variable shortVar clearly indicates its type.

4fill in blank

hard

Fill both blanks to declare a variable with 8 bytes storage and assign a large number.

C

[1] [2] = 9223372036854775807LL;

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Along long

Bint

CbigNum

Dlong

Attempts:

3 left

💡 Hint

Common Mistakes

Using int which is usually 4 bytes.

Using variable names that don't describe the value.

long long is an 8-byte integer type in C. Naming the variable bigNum clearly shows it stores a big number.

5fill in blank

hard

Fill all three blanks to declare a floating-point variable with 8 bytes storage and assign a value.

C

[1] [2] = [3];

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Adouble

Bpi

C3.141592653589793

Dfloat

Attempts:

3 left

💡 Hint

Common Mistakes

Using float which is 4 bytes.

Using unclear variable names.

double is an 8-byte floating-point type. Naming the variable pi is meaningful for this value.