interest_rate

sum_of_dice

Concatenate all the words and capitalize the first character of each word except the first. Examples:

interestRate

sumOfDice

Keywords Examples of keywords are: auto, do, while, int, float, long, and const. You are not allowed to use keywords as your own identifiers Standard identifiers Examples: scanf and printf You may use a standard identifier as an identifier only if you do not want to use the object that comes with the compiler.

© Gilbert Ndjatou

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Variables and Basic Data Types A variable has: o A name, o A data type o And an address.

Data Type

Type of Data

Range of Values

bool

Boolean value

true, false

char

A single character

ASCII character representations

short short int unsigned short unsigned short int int unsigned unsigned int long long int unsigned long unsigned long int float double long double

15

15

Size on PC

1 byte

integers

-2 (-32,768) to 2 – 1 (32,767)

2 bytes

integers

0 to 216 – 1 (65,535)

2 bytes

integers

-231 (-2,147,483,648) to 231 – 1 (2,147,483,647)

4 bytes

32

integers

0 to 2 – 1 (4,294,967,295)

4 bytes

integers

-231 (-2,147,483,648) to 231 – 1 (2,147,483,647)

4 bytes

integers

0 to 232 – 1 (4,294,967,295)

4 bytes

Floating point decimals Floating point decimals Floating point decimals

Negative range: -3.4028235E+38 to -1.4E-45 Positive range: 1.4E-45 to 3.4028235E+38 Negative range: -1.7976931348623157E+308 to -4.9E-324 Positive range: 4.9E-324 to 1.7976931348623157E+308 Negative range: -1.18E+4932 to -3.37E-4932 Positive range: 3.37E-4932 to 1.18E+4932

4 bytes 8 bytes 10 bytes

The number of bytes that are used to represent a data type depends on the computer. You can use the sizeof() function to find out the size of a basic data type on a computer. The following statement displays the size of int, long, and double data types: cout