Scilab Function
Last update : 07/09/2007

while - while keyword

### Description

`while` clause. Must be terminated by `"end"`

`while expr ,instructions,...[,else instructions], end`

`while expr do instructions,...[,else instructions], end`

`while expr then instructions,...[,else instructions], end`

Notes:

  The only constraint is that each "then" or "do" keyword must be on the same line line as "while" keyword.

  The "keyword "then" or "do" can be replaced by a carriage return or a comma. For compatibility with Matlab it is also possible, but not recommended, to put a space between the end of the expression and the beginning of the first instruction.

  The optional `,else instructions` construction allows to gives instructions which are executed when expr expression becomes false.

Warning: the number of characters used to define the body of any conditionnal instruction (if while for or select/case) must be limited to 16k.

### Examples

    	     e=1; a=1; k=1;
    	     while norm(a-(a+e),1) > %eps, e=e/2; k=k+1; end
    	     e,k

### See Also

`for`, `select`, `break`, `return`, `pause`,