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Syntax Sunsnsary
DEC$ (see Chapter 4)
Use DEC$ is a function which converts a numeric value to a formatted decimal string.
Syntax DEC$(argument, template)
where argumentis a numeric-expression, and template is a string-expression.

DEF (see Chapter 6)
Use DEF is used to define am expression function.
Syntax DEF function-identifier[ I parameter[, parameter)... I )— result-expression where function-identifleris an idenfifier, and result-expression is an expression of the same type.
Each parameter must be a simple-variable.

DEG (see Chapter 3)
Use
lEG is a function to converts angles in radians to degrees.
Syntax
DEitargumentl
where
argumentis a numeric-expression.
DEL (see Chapter 15)
Use DEL deletes files. (See also ERASE and KILL)
Syntax DEL rest-of-line
where file-filter is a string-expression
rest-of-line is everything up to the end of the line

DELKEY (see Chapter 13)
Use DELKEY deletes a key forthe current record.
Syntax DELKEY [#)stream-number[,) key if,) LOCK lock-type)
where key is: KEY key-value if,) INDEX index-number)
on: AT position-string
where key-value is an expression, giving a value compatible with the index’s keytype index-number is an integer-expression, giving a value in the range 1.20.
posifion-stringis a string-expression, giving a value once returned by POSITIONS.
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