Delay Prompt Literals
The delay prompt literal is always of type Prompt.
DelayPrompt:
DelayPromptDeclarator [Expression]
DelayPromptDeclarator:
any case of DP
Delay prompts correspond to a silence pause of the specified number of milliseconds in parameter. Floating point literals and string are converted to an Integer representation. The expression must be of type String or a java.lang.Number type (that is, integral or floating-point).
Example Delay Prompt Literals:
DP[500] // 500 milliseconds of silence
DP[1000.45] // 1 second of silence