 Search

# MES Platform 2.0  ## Help Versions

Go to start of banner

# Data Types and Formats

This page is a reference to the various data types and formats that are used while scripting.

### int

• Int data type is a 32-bit signed two's complement integer

• Minimum value is - 2,147,483,648 (-2^31)

• Maximum value is 2,147,483,647(inclusive) (2^31 -1)

• Integer is generally used as the default data type for integral values unless there is a concern about memory

• The default value is 0

• Example: int a = 100000, int b = -200000

### long

• Long data type is a 64-bit signed two's complement integer
• Minimum value is -9,223,372,036,854,775,808(-2^63)
• Maximum value is 9,223,372,036,854,775,807 (inclusive)(2^63 -1)
• This type is used when a wider range than int is needed
• Default value is 0L
• Example: long a = 100000L, long b = -200000L

### float

• Float data type is a single-precision 32-bit IEEE 754 floating point

• Float is mainly used to save memory in large arrays of floating point numbers

• Default value is 0.0f

• Float data type is never used for precise values such as currency

• Example: float f1 = 234.5f

Duration values are in minutes plus fractions of minutes (not seconds).
Example: 5.40 = 5 minutes and 24 seconds (because 0.40 = 24sec/60sec).

### double

• double data type is a double-precision 64-bit IEEE 754 floating point

• This data type is generally used as the default data type for decimal values, generally the default choice

• Double data type should never be used for precise values such as currency

• Default value is 0.0d

• Example: double d1 = 123.4

Duration values are in minutes plus fractions of minutes (not seconds).
Example: 5.40 = 5 minutes and 24 seconds (because 0.40 = 24sec/60sec).

### boolean

• boolean data type represents one bit of information
• There are only two possible values: true and false
• This data type is used for simple flags that track true/false conditions
• Default value is false
• Example: boolean one = true

### String

String types of literals can contain any Unicode characters

•  Example: String a = "\u0001"

### DateTime

See the Ignition documentation for various date functions: DateTime

• Months start at 0 (January = 0 and December = 11).
• The first day of any month starts at 1.

### List

The list can be written as comma-separated values (items) between square brackets.

• Items in a list need not be of the same type.
• List indices start at 0, and lists can be sliced, concatenated and so on.
• Example:
list l1 = ['Sarah', 'process segment', 100, 2018]
list l2 = [1, 2, 3, 4, 5 ]
list l3 = ["a", "b", "c", "d"]

### PyDictionary

A Python Dictionary is a collection of key-value pairs within curly braces that is unordered, changeable and indexed.

In the following example the Date and Value pairs is passed as a python dictionary.

values={dateTime1:4, dateTime2:3}

• No labels