How do I use integer, single, float and int64 variables in Delphi

In Delphi, you can use the following types to store integer values

• Byte an unsigned 8-bit integer, ranging from 0 to 255
• ShortInt a signed 8-bit integer, ranging from -128 to 127
• Word an unsigned 16-bit integer, ranging from 0 to 65,535
• SmallInt a signed 16-bit integer, ranging from -32,768 to 32,767
• LongWord an unsigned 32-bit integer, ranging from 0 to 4,294,967,295
• Integer a signed 32-bit integer, ranging from -2,147,483,648 to 2,147,483,647
• Int64 a signed 64-bit integer, ranging from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
• To declare a variable of one of these types, you can use the following syntax

You can also use the Single type to store single-precision floating-point values, and the Double type to store double-precision floating-point values. To declare a variable of one of these types, you can use the following syntax

You can assign values to these variables using standard assignment statements, like this

You can also perform arithmetic operations on these variables, like this

Note that you should be careful when performing arithmetic operations with floating-point values, as they are not always represented exactly in the computer’s memory and may introduce small errors in your calculations.