regex

links importantes:
  https://www.regular-expressions.info/numericranges.html
  https://www.regular-expressions.info/examples.html
  https://www.icewarp.com/support/online_help/203030104.htm
  https://www.ibm.com/support/knowledgecenter/en/ssw_ibm_i_73/db2/rbafzregexp_like.htm

exemplos:

    validar numeros inteiros no intervalo de 0 a 9:
      \b([0-9])\b
      
    validar numeros inteiros no intervalo de 0 a 99:
      \b([0-9]|[1-9][0-9])\b
      
    validar numeros inteiros no intervalo de 0 a 199:
      \b([0-9]|[1-9][0-9]|1[0-9][0-9])\b
  
    validar numeros inteiros no intervalo de 1 a 200:
      \b([1-9]|[1-9][0-9]|1[0-9][0-9]|200)\b
      
    validar numeros inteiros no intervalo de 0 a 200:
      \b([0-9]|[1-9][0-9]|1[0-9][0-9]|200)\b
    
    validar numeros inteiros no intervalo de 0 a 249:  
      \b([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9])\b
 
    validar numeros inteiros no intervalo de 0 a 250:  
      \b([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|250)\b