1 <html lang="en"> 2 <head> 3 <meta charset="UTF-8"> 4 <meta name="viewport" content="width=device-width, initial-scale=1.0"> 5 <meta http-equiv="X-UA-Compatible" content="ie=edge"> 6 <title>全局函数---数值型函数</title> 7 </head> 8 <body> . 9 < Script > 10 . 11 / * 12 is the parseInt (srting, radix) when the radix value of the parameter is zero, or not set this parameter 13 is the parseInt () will be judged according to the digital base string 14 15 *** 16 If the string to 0x at the beginning, the parseInt () parses the remainder of the string will hexadecimal integer 17 if the string starts with 0, then EcmEaScript V3 allows the parseInt () to achieve a 18 string parsing the subsequent octal or hexadecimal system number 19 If the string begins with numbers 1 to 9, parseInt () will resolve it to a decimal integer of 20 string characters if legal interception legitimate start character 21 is 22 is * / 23 is document.write (the parseInt ( ' 34 is ' ) +'<br/>') 24 document.write(parseInt('0X123')+'<br/>') 25 document.write(parseInt('string')+'<br/>') 26 document.write(parseInt('我说一只猫')+'<br/>') 27 document.write(parseInt('11 12 13 ') +'<br/>') 28 29 / * the parseInt function specifies whether the first string is a digital string, and if so, 30 then the string is parsed, up until the end of the digital, the digital and digital returns 31 instead of as a string 32 parseFloat (String) returns the converted float 33 is * / 34 is </ Script > 35 36 </ body > 37 [ </ HTML >