StringIsNumber

STRINGISNUMBER returns 1 if the input string contains only a number and otherwise a zero.

Version 1.0.0.0 (597 Bytes)
2.1K Downloads
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22 Nov 2004

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STRINGISNUMBER returns 1 if the input string contains only a number and otherwise a zero

Created as an example for the thread "How to determine if an inputfield contains chars or numbers ?"

USAGE:
>> StringIsNumber('aseea')
ans = 0
>> StringIsNumber('333')
ans = 1
>> StringIsNumber('333.123')
ans = 1
>> StringIsNumber('.123')
ans = 1
>> StringIsNumber('0.123')
ans = 1
>> StringIsNumber('0.123a')
ans = 0

IT'S NOT FANCY BUT IT WORKS

Cite As

Michael Robbins (2026). StringIsNumber (https://www.mathworks.com/matlabcentral/fileexchange/6283-stringisnumber), MATLAB Central File Exchange. Retrieved .

Categories

Find more on Characters and Strings in Help Center and MATLAB Answers

General Information

MATLAB Release Compatibility

  • Compatible with any release

Platform Compatibility

  • Windows
  • macOS
  • Linux
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Version Published Release Notes
1.0.0.0

Digits followed by a period but no more digits is now considered a number.

A single period is no longer considered a number.

Vector inputs and outputs are supported.