VBScript Asc function
Complete VBScript Reference Asc function to the first letter of the string is converted to the corresponding ANSI code and returns the result.
grammar
Asc(string)
| 参数 | 描述 |
|---|---|
| string | 必需。字符串表达式。不能为空字符串！ |
Examples
Example 1
<script type="text/vbscript">
document.write(Asc("A") & "<br />")
document.write(Asc("a") & "<br />")
document.write(Asc("F") & "<br />")
document.write(Asc("f") & "<br />")
document.write(Asc("2") & "<br />")
document.write(Asc("#") & "<br />")
</script>
document.write(Asc("A") & "<br />")
document.write(Asc("a") & "<br />")
document.write(Asc("F") & "<br />")
document.write(Asc("f") & "<br />")
document.write(Asc("2") & "<br />")
document.write(Asc("#") & "<br />")
</script>
Examples of the above output:
65
97
70
102
50
35
97
70
102
50
35
try it"
Example 2
Asc returns the first character in the string ANSI code:
<script type="text/vbscript">
document.write(Asc("W") & "<br />")
document.write(Asc("W3CSchool.com"))
</script>
document.write(Asc("W") & "<br />")
document.write(Asc("W3CSchool.com"))
</script>
Examples of the above output:
87
87
87
try it"
Example 3
How to Return a string all the characters in the ANSI code:
<script type="text/vbscript">
txt="W3schools.com"
for i=1 to len(txt)
document.write(Asc(mid(txt,i,1)) & "<br />")
next
</script>
txt="W3schools.com"
for i=1 to len(txt)
document.write(Asc(mid(txt,i,1)) & "<br />")
next
</script>
Examples of the above output:
87
51
115
99
104
111
111
108
115
46
99
111
109
51
115
99
104
111
111
108
115
46
99
111
109
try it"
Complete VBScript Reference