Sollya User's Manual

Name:

print prints an expression

Usage:

print(expr1,...,exprn) : (any type,..., any type) -> void print(expr1,...,exprn) > filename : (any type,..., any type, string) -> void print(expr1,...,exprn) >> filename : (any type,...,any type, string) -> void

Parameters:

expr represents an expression
filename represents a character sequence indicating a file name

Description:

print(expr1,...,exprn) prints the expressions expr1 through exprn separated by spaces and followed by a newline.

If a second argument filename is given after a single ">", the displaying is not output on the standard output of Sollya but if in the file filename that get newly created or overwritten. If a double ">>" is given, the output will be appended to the file filename.

The global variables display, midpointmode and fullparentheses have some influence on the formatting of the output (see display, midpointmode and fullparentheses).

Remark that if one of the expressions expri given in argument is of type string, the character sequence expri evaluates to is displayed. However, if expri is of type list and this list contains a variable of type string, the expression for the list is displayed, i.e. all character sequences get displayed surrounded by double quotes ("). Nevertheless, escape sequences used upon defining character sequences are interpreted immediately.

Example 1:

   > print(x + 2 + exp(sin(x)));
   x + 2 + exp(sin(x))
   > print("Hello","world");
   Hello world
   > print("Hello","you", 4 + 3, "other persons.");
   Hello you 7 other persons.

Example 2:

Example 3:

   > print(x + 2 + exp(sin(x))) > "foo.sol";
   > readfile("foo.sol");
   x + 2 + exp(sin(x))

Example 4:

> print(x + 2 + exp(sin(x))) >> "foo.sol";

Example 5:

   > display = decimal;
   Display mode is decimal numbers.
   > a = evaluate(sin(pi * x), 0.25);
   > b = evaluate(sin(pi * x), [0.25; 0.25 + 1b-50]);
   > print(a);
   0.70710678118654752440084436210484903928483593768847
   > display = binary;
   Display mode is binary numbers.
   > print(a);
   1.01101010000010011110011001100111111100111011110011001001000010001011001011111011000100110110011011101010100101010111110100111110001110101101111011000001011101010001_2 * 2^(-1)
   > display = hexadecimal;
   Display mode is hexadecimal numbers.
   > print(a);
   0xb.504f333f9de6484597d89b3754abe9f1d6f60ba88p-4
   > display = dyadic;
   Display mode is dyadic numbers.
   > print(a);
   33070006991101558613323983488220944360067107133265b-165
   > display = powers;
   Display mode is dyadic numbers in integer-power-of-2 notation.
   > print(a);
   33070006991101558613323983488220944360067107133265 * 2^(-165)
   > display = decimal;
   Display mode is decimal numbers.
   > midpointmode = off;
   Midpoint mode has been deactivated.
   > print(b);
   [0.70710678118654752440084436210484903928483593768844;0.70710678118654949743721782517557347782646274417048]
   > midpointmode = on;
   Midpoint mode has been activated.
   > print(b);
   0.7071067811865~4/5~
   > display = dyadic;
   Display mode is dyadic numbers.
   > print(b);
   [2066875436943847413332748968013809022504194195829b-161;16535003495550825444196237019385936414432675156571b-164]
   > display = decimal;
   Display mode is decimal numbers.
   > autosimplify = off;
   Automatic pure tree simplification has been deactivated.
   > fullparentheses = off;
   Full parentheses mode has been deactivated.
   > print(x + x * ((x + 1) + 1));
   x + x * (x + 1 + 1)
   > fullparentheses = on;
   Full parentheses mode has been activated.
   > print(x + x * ((x + 1) + 1));
   x + (x * ((x + 1) + 1))

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