How to determine the size of a letter in VB?

2 years ago
Sophia Anderson
1 minute

In VB, you can use built-in functions to determine the size of letters. Here are two common methods:

  1. The Asc function can convert characters into their corresponding ASCII codes. In ASCII, the range for uppercase letters is 65-90 and for lowercase letters it is 97-122, allowing for comparison of ASCII codes to determine letter size. Sample code is provided below.
Dim letter As String
letter = "A"

If Asc(letter) >= 65 And Asc(letter) <= 90 Then
    ' 大写字母
ElseIf Asc(letter) >= 97 And Asc(letter) <= 122 Then
    ' 小写字母
End If
  1. VB also provides the IsUpper and IsLower functions for determining if a character is an uppercase or lowercase letter. The example code is shown below:
Dim letter As String
letter = "A"

If Char.IsUpper(letter) Then
    ' 大写字母
ElseIf Char.IsLower(letter) Then
    ' 小写字母
End If

It is important to note that the second method requires importing the System namespace, which means adding the Imports System statement at the beginning of the code.

bannerAds