We need to declare variables with the specific Datatypes. Since C is an older language.
Available Data types in C
int
- Takes 4 bytes / 32 bits of integer.
- Range of possible numbers is limited.
- From Negative 2 Billion to Positive 2 Billion
unsigned int
- It is a qualifier that can be applied to certain datatypes.
- It can effectively double the positive range of variables of the type by disallowing negative values.
- From 0 to 4 Billion
char
- Used to store Characters
- Takes 1 byte / 8 bit of memory
- ACII allows mapping of characters to various numbers.
void
It is a type and not a data type. It does exist. Functions can return void. It means it doesn’t take any parameters. It takes a placeholder, when there is no return value associated with the function.
Available Data Types in CS50.h
bool
Used to store Boolean values True or False
string
used to store variables to store a series of characters / word
C# supports 3 Data Types to Hold Decimals
float
- Real numbers with decimals
- Takes 4 bytes / 32 bits of memory
- They have a precision problem there is just 32 bits to work with
- Need to put F after the number to let the compiler know about the status of the Number. AKA Literal Suffix.
- Float data type is the least precise.
double
They take 8 bytes / 64 bits of information Used to store variables with floating-point values / real numbers No need to put in a Literal Suffix. Compiler defaults to take a decimal values as double.
decimal
Takes in 28 - 29 digits past the decimal position. Need an Literal Suffix of m after the number.
Data Types are important in C# unlike Javascript. The idea of Enforcing Data Types helps a developer to avoid bugs!
Mindful Allocation of Data Types is important. Data Types inform capabilities. If no calculation is required then always use a String and Vice Verca
Data Types are usually used along with Variable.