Solidity - Datatypes

Solidity is a statically typed language, which means every variable declared must have a type of data to store.

Variables declared in a program to store the data. Solidity provides two types of data types.

It allocates memory size based on datatype.

• Value Types
• Reference Types

Solidity Value Types

• Bool It is a boolean, that contains true/false -Integer types

It provides multiple various integer types

Solidity provides multiple types to store signed and unsigned integers.

singed integers types: It uses stores positive and negative numbers

unsigned integers types: It uses store positive numbers

Notes:

The default value is zero for int and unit types Solidity prevents Overflow errors at compile time only

-Fixed Point Numbers

These are used to store floating numbers with decimal values.

It provides signed and unsigned fixed-point numbers with multiple sizes singed Fixed types: It uses stores positive and negative numbers unsinged Fixed types: It uses store positive numbers

-fixed/ufixed: It is an alias fixed128x18/ufixed128x18. -fixedMxN/ufixedMxN:

M represents several bits, and the value is divisible by 8. 8 to 256. N represents the number of decimals

Solidity Address Type

the address is a type in the solidity that stores blockchain address memory location.

It contains a 20-byte value.

The address contains a properties balance and transfer

solidity Fixed-size byte array types

It provides multiple byte types - bytes1, bytes2 … bytes32.

Another type, bytes is an alias for bytes1.