expression operators and other operators. Whitespace (blanks, tabs, and newlines) are ignored and are expected to serve as token separators. 1.1.1 Comments Comments begin with “// ” and ends with a carriage return or new line. Comments can begin anywhere in a line. 1.1.2 Identifiers An identifier consists of a sequence of letters, digits, and underscores “_”. The first character of an identifier should be a letter. Identifiers are case-sensitive. 1.1.3 Keywords The following identifiers are reserved as keywords, and should not be used otherwise: if else for value validate generate return break continue load save let print true false in newseries scatter line bar 1.1.4 Constants There are two types of constants – numbers and strings. Their format is defined as follows: 126.96.36.199 Numbers A number consists of one or more digits with an optional decimal point “.”. A number with a decimal must have the following format: An integer constant followed by a decimal point and an “e ” or “E ” followed by a signed integer exponent. A positive exponent may be preceeded by a plus sign “+”. A negative exponent must have a minus sign “-“. 188.8.131.52 Strings A string can be one or more characters enclosed in double quotes “ “ ”. Any doublequotes within a string must be preceded by a backslash “\ ” character. 1.1.6 Other tokens The following operators or symbolic characters are used
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