Values in Miranda
Miranda is a functional programming language, so the approach will be quite different from the imperative style used in the original example. Here’s how we might express similar concepts in Miranda:
|| Strings can be concatenated using the ++ operator
string_example = "miranda" ++ "lang"
|| Integers and floating-point numbers
integer_example = 1 + 1
float_example = 7.0 / 3.0
|| Booleans with logical operators
boolean_and = True & False
boolean_or = True \/ False
boolean_not = ~True
|| Main function to print results
main = [string_example,
show integer_example,
show float_example,
show boolean_and,
show boolean_or,
show boolean_not]In Miranda, we define values and functions rather than using print statements. The main function returns a list of strings that will be printed when the program is run.
Let’s break down the differences:
Strings: Miranda uses
++for string concatenation instead of+.Numbers: Integer and float operations are similar, but Miranda uses
/for both integer and float division.Booleans: Miranda uses
&for AND,\/for OR, and~for NOT. Boolean values areTrueandFalse(capitalized).Function definition: Instead of a
main()function, we definemainas a list of results.Printing: Miranda doesn’t have built-in print functions. Instead, the
mainfunction returns a list of values to be printed. We useshowto convert non-string values to strings.
To run this Miranda program, you would typically save it in a file (e.g., values.m) and then use the Miranda interpreter:
$ mira values.m
"mirandalang"
2
2.3333333333333335
False
True
FalseNote that the exact syntax for running Miranda code may vary depending on your specific Miranda implementation.
Miranda is a purely functional language, so concepts like mutable variables or imperative programming constructs are not applicable. This example demonstrates how to work with basic values and operations in a functional paradigm.