Page 247 - Computer_Science_F5

Computer Science Table 4.3: Integer Data types Storage size Range
Type
4 byte
Integer
-2,147,483,648 to 2,147,483,647
Unsigned integer
0 to 4,294,967,295
4 byte
FOR ONLINE READING ONLY
Short integer
Unsigned short integer 2 bytes -32,768 to 32,767
0 to 65,535
2 bytes
Long integer 4 bytes -2,147,483,648 to 2,147,483,647
Unsigned long integer 4 byte 0 to 4,294,967,295

(b) Character data types
Character data types comprise alphabetical data. These include char, signed char and
unsigned char. The classification of character data types with their storage size and
range of storing data is represented in Table 4.4.

Table 4.4: Character data types
Type Storage size Range
Char 1 byte -128 to 127 or 0 to 255
Signed char 1 byte -128 to 127
Unsigned char 1 byte 0 to 255

(c) Float data types
Float data types are based on decimal numbers. Float data types include float, double
and long double. Table 4.5 represents float data types with their storage size and
range.

Table 4.5: Float data types
Type Storage size Range
Float 4 bytes ±3.4E-38 to ±3.4E38

Double 8 bytes ±1.7E-308 to ±1.7E308
Long double 8 bytes ±1.7E-308 to ±1.7E308

(d) Bool data types
The bool data type has only two values, namely true and false. True and false are
also called the logical (Boolean) values. The central purpose of this data type is to
manipulate logical expressions. Use this data type for simple flags that track true/
false conditions.

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for Advanced Secondary Schools

Computer Science Form 5.indd 238 23/07/2024 12:33