函数"/>
parseint函数
parseint函数
The function parseInt() is used to convert a string to the integer or we can say it can be used to parse a string and returns an integer.
函数parseInt()用于将字符串转换为整数，或者可以说可以将其用于解析字符串并返回整数。
Some of the points to remember:
需要记住的几点：
If a string contains number at the starting it can parse and returns the number.
如果字符串开头包含数字，则可以解析并返回数字。
If a string contains alphabets at the starting and then the number, it cannot parse and returns "NaN".
如果字符串开头包含字母，然后包含数字，则无法解析并返回“ NaN” 。
If a string contains leading and trailing spaces still function works and parse the string.
如果字符串包含前导和尾随空格，则函数仍然起作用并解析该字符串。
As we have discussed in the post convert hexadecimal string to the decimal – parseInt() function parses the octal formatted value by passing base 8 and hexadecimal value by passing base 16 to the number.
正如我们在后文中讨论的那样， 将十六进制字符串转换为十进制 – parseInt()函数通过将基数8传递给八进制格式值，并通过将基数16传递给数字来解析十六进制值。
Example:
例：
<html>
<head>
<title>JavaScipt Example</title>
</head><body><script>var str1 = "123"; //decoimal stringvar str2 = "12.23"; //float stringvar str3 = "123 456 789" //multiple Numbers var str4 = " 123 "; //string contains leading & trailing spacesvar str5 = "012" ; //octal stringvar str6 = "0x0A"; //hexadecimal stringvar str7 = "123456 is my password"; //string contains Number in startingvar str8 = "My password is 123456"; //string contains Number in ending//parsing & pritning the valuesdocument.write("Number value of str1: " + parseInt(str1) + "<br>");document.write("Number value of str2: " + parseInt(str2) + "<br>");document.write("Number value of str3: " + parseInt(str3) + "<br>");document.write("Number value of str4: " + parseInt(str4) + "<br>");document.write("Number value of str5: " + parseInt(str5,8) + "<br>");document.write("Number value of str6: " + parseInt(str6,16) + "<br>");document.write("Number value of str7: " + parseInt(str7) + "<br>");document.write("Number value of str8: " + parseInt(str8) + "<br>");</script>
</body>
</html>
Output
输出量
Number value of str1: 123
Number value of str2: 12
Number value of str3: 123
Number value of str4: 123
Number value of str5: 10
Number value of str6: 10
Number value of str7: 123456
Number value of str8: NaN
翻译自: .aspx
parseint函数
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parseint函数
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