REBOL 3 Datatypes: Integer!

Contents

Concept

The integer! datatype includes 32-bit positive and negative numbers and zero. Unlike decimal numbers, integers do not contain a decimal point.

Format

Integer values consist of a sequence of numeric digits. A plus (+) or minus (-) immediately before the first digit indicates sign. (There cannot be a space between the sign and the first digit.) Leading zeros are ignored.

0 1234 +1234 -1234 00012 -0123

Do not use commas or periods in integers. If a comma or period is found within an integer it is interpreted as a decimal value. However, you can use a single quote (`) to separate the digits in long integers. Single quotes can appear anywhere after the first digit in the number, but not before the first digit.

2'147'483'647

Integers span a range from -2147483648 to 2147483647.

Creation

Use the to-integer function to convert a string!, logic!, decimal!, or integer! datatype to an integer:

probe to-integer "123"
123

probe to-integer false
0

probe to-integer true
1

probe to-integer 123.4
123

probe to-integer 123.8
123

probe to-integer -123.8
-123

If a decimal and integer are combined in an expression, the integer is converted to a decimal:

probe 1.2 + 2
3.2

probe 2 + 1.2
3.2

probe 1.01 > 1
true

probe 0 < .001
true

Related

Use integer? to determine whether a value is an integer! datatype.

probe integer? -1234
true

Use the form, print, and mold functions with an integer argument to print a integer value as a string:

probe mold 123
123

probe form 123
123

print 123
123

Integers that are out of range or cannot be represented in 32 bits are flagged as an error.