SIMPLE & COMPLEX DATA TYPES & VARIABLES

Question 1

Bit

Answer 1

Holds one of two values: 0 or 1.
Basic & smallest block of computer memory

Question 2

Bytes

Answer 2

8 bits

Question 3

Word

Answer 3

Natural unit of memory for a given computer design.
Larger a word is the more information it can store

Question 4

Integer/arithmetic data type

Answer 4

Char
Int
Short
Long

Question 5

Floating point data types

Answer 5

Float
Double

Question 6

Void

Answer 6

Function that returns no value: void(something)
/has no parameter: something(void)

Question 7

Char

Answer 7

1 byte
Stores single character in single pair of quotation marks
%c

Question 8

Int

Answer 8

2/4 bytes
Stores whole numbers
%d

Question 9

Float

Answer 9

Single precision floating pt value
4 byte
6 decimal places
%f

Question 11

Double

Answer 11

Double precision floating pt value
8 bytes
15 decimal places
%lf

Question 12

Constants

Answer 12

Fixed values(literals) that the program may not alter during its
execution.

Must be defined before the main function.

Format:
#define CONSTANTNAME value

Question 13

Long

Answer 13

Stores large integer
8 /4 bytes

Question 14

Arrays

Answer 14

Ordered sequence of data elements of one type.

Counting begins at zero. Account for null character \0 when determining size.

Format:
type array[size];

Question 15

Character string

Answer 15

General formats:

For word
char array[size]=”string “;

For single characters
char array[size]={‘a’,’b’,’c’,’\0’};

Function descriptor
%s
No, ‘&’ needed in scanf.

Question 16

General string characteristics

Answer 16

type array[size];

Word
type array[size]=’string name’;
Single numbers
type array[size]={a,b,c};

Multidimensional array:
type array[size1][size2];

Multidimensional single no. :
type array[size1][size2]={{a,b,c},{d,e,f}};

Question 17

Variable

Answer 17

Tells the compiler where and how much storage to create for the variable. Specifies a data type and contains a list of one or more variables of that.
Variable names:
 should be lowercase for local variables
 should be UPPERCASE for constant