Seed7 - The extensible programming language
Seed7 FAQ Manual Screenshots Examples Libraries Algorithms Download Links
Examples echo args file in string simple clock count words subtype map function generic func declare stmt template operator 3-way if
Echo the program arguments
 previous   up   next 

This example program writes its arguments

$ include "seed7_05.s7i";       # Standard Seed7 library

const proc: main is func
    var string: stri is "";
    for stri range argv(PROGRAM) do
      write(stri <& " ");
    end for;
  end func;

Everything between # and the end of the line is a comment which is ignored.

The keyword 'local' introduces local declarations. In this case the string variable 'stri' is declared and initialized with "", the empty string literal.

The function argv(PROGRAM) returns the program arguments as array of strings. The 'for' (for-each) loop iterates over all elements of this array. The for-each statement is overloaded for various collection types.

The <& operator is used to concatenate elements before writing. If one operand of the <& operator has not the type string it is converted to a string using the 'str' function.

 previous   up   next