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--- en:variables [2016/01/01 22:42]
127.0.0.1 external edit
+++ en:variables [2016/08/09 18:23]
admin
@@ Line 1: / Line 1: @@
 ===== Variables =====
-Variables that hold numeric values must begin with a letter, and may consist of any number of alpha-numeric characters.  They are case sensitive.  They may be used interchangeably with numeric constants.\\
+You can think of a variable as a place in the computer's memory to store things.  Each variable has a name that must begin with a letter, and may consist of any number of letters, numbers, and dollar signs.  Their names are case sensitive, the variable 'a' is not the same as the variable "A".\\
-\\
-Variables that hold string values follow the same rules as numeric variables, but must end with a dollar sign ($).  They may be used interchangeably with string constants.
+==== Example ====
-\\
+|a = 99|Assigns the integer 99 to the variable a|
-When you assign a numeric value to a string variable or add a numeric value to a string (concatenate) the number will be automatically converted to a string before the operation is completed.  A string value may not be assigned directly to a numeric variable or array element without manually converting it's type using the [[int|Int]] or [[float|Float]] functions.
+|nom = "Jim"|Assigns the string "Jim" to the variable nom|
-\\
+|print "Say hello to " + nom|Appends the string in nom the the string "Say hello to " and displays the result|
-^Variable Assignment^^^^
+|a = a + 1|Takes the value of a and adds one to it, then store the new value back into a|
-^Operator^Name^Example^Comments^
-|=|Assign a Number to a Numeric Variable|a = 9| |
-|=|Assign a String to a String Variable|z$ = "Hola."| |
-|=|Assign a Number to a String Variable|q$ = 9.9| |
-|+=|Add to Numeric Variable|a += 7|Same as a = a + 7 <sup>1</sup>|
-|+=|Concatenate to String Variable|f$ += "."|Same as f$ = f$ + "."  <sup>1</sup>|
-|-=|Subtract from Numeric Variable|a -= 9|Same as a = a - 9 <sup>1</sup>|
-|*=|Multiply Numeric Variable|a *= 2|Same as a = a * 2 <sup>1</sup>|
-|/=|Divide Numeric Variable|a /= 8|Same as a = a / 8 <sup>1</sup>|
 \\
-<sup>1</sup> added with version 0.9.9.10
+In previous versions (before 1.99.99.8) Variables that contained strings were required to end with a dollar sign ($).  This limitation has been removed and any variable may store any type of value.\\
+See also: [[variableoperators|Variable Operators]]

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