isdecimal() is an in-built method in Python, which is used to check whether a string contains only decimal characters or not.

isdecimal()是Python中的內置方法，用于檢查字符串是否僅包含十進制字符。

Note:

注意：

• Decimal characters contain all digits from 0 to 9.

  十進制字符包含從0到9的所有數字。

• String should be Unicode object - to define a string as Unicode object, we use u as prefix of the string value.

  字符串應為Unicode對象-要將字符串定義為Unicode對象，我們使用u作為字符串值的前綴。

Syntax:

句法：

    String.isdecimal();

Parameter: None

參數：無

Return type:

返回類型：

• true - If all characters of the string are decimal characters then method returns true.

  true-如果字符串的所有字符均為十進制字符，則method返回true 。

• false - If any of the characters of the string is not a decimal character then method returns false.

  false-如果字符串中的任何字符都不為十進制字符，則方法返回false 。

Example/program:

示例/程序：

# str1 with only decimal characters
str1 = u"362436"
print str1.isdecimal ()
# str2 with alphabets and decimal characters
str2 = u"Hello36"
print str2.isdecimal ()
# str3 with alphabets and special characters
str3 = u"@Hell36#"
print str3.isdecimal ()

Output

輸出量

    TrueFalseFalse

Reference: String isdecimal()

參考： 字符串isdecimal()

翻譯自: https://www.includehelp.com/python/string-isdecimal-method-with-example.aspx