Check if all given strings are valid numbers

Summary

The isnumber macro checks if all provided arguments are valid numeric values. Returns true only if all arguments are numbers, false otherwise.

Syntax 

${isnumber;<string>[;<string>...]}

Parameters

  • string - One or more strings to check (minimum 1 required)

Behavior

  • Returns true if all arguments are valid numbers
  • Returns false if any argument is not numeric
  • Accepts integers and decimals
  • Scientific notation supported
  • Requires at least one argument

Examples

Check if numeric:

${if;${isnumber;${value}};is-numeric;not-numeric}

Validate multiple values:

${isnumber;123;45.6;-78}
# Returns: true

Not a number:

${isnumber;abc}
# Returns: false

Mixed values:

${isnumber;123;abc}
# Returns: false (all must be numeric)

Use Cases

  • Input validation
  • Type checking
  • Numeric validation before operations
  • Configuration validation
  • Data type verification

Notes

  • All arguments must be numeric for true
  • Supports integers, decimals, negative
  • Scientific notation accepted
  • Requires at least one argument
  • Returns boolean
  • See also: ${matches} for pattern matching

See test cases in MacroTestsForDocsExamples.java