Sollya User's Manual

Name:

write prints an expression without separators

Usage:

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

Parameters:

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

Description:

write(expr1,...,exprn) prints the expressions expr1 through exprn. The character sequences corresponding to the expressions are concatenated without any separator. No newline is displayed at the end. In contrast to print, write expects the user to give all separators and newlines explicitly.

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 quotes ("). Nevertheless, escape sequences used upon defining character sequences are interpreted immediately.

Example 1:

   > write(x + 2 + exp(sin(x)));
   > write("Hello\n");
   x + 2 + exp(sin(x))Hello
   > write("Hello","world\n");
   Helloworld
   > write("Hello","you", 4 + 3, "other persons.\n");
   Helloyou7other persons.

Example 2:

Example 3:

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

Example 4:

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

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