This method is the simplest and most convenient. Switch the sogou input method to Chinese mode directly, and input the pinyin "fai" through the keyboard, so that we can see the diameter symbol φ at the position where the search results are displayed, and select the number 5 in front of it to complete the input.

Method 2:

This method is ingenious and simple. The method is to search for a diameter symbol directly on the internet, and then copy and paste it into the corresponding position in the document.

Method 3:

1. This method is to insert symbols directly in word to complete the input. First, the first step is to click the Insert option in the icon position in the menu bar.

2. Then, click the symbol in the toolbar at the far right of the word page.

3. After clicking the symbol, a symbol list will appear below it. Some symbols are displayed in the list, but there are no diameter symbols. We need to click on other symbols at the bottom.

4. After clicking other symbols, the dialog box as shown in the figure will pop up. Find the "character code" at the bottom of the dialog box, enter the code: 03A6 in the dialog box behind the character code, and then press enter, so that the diameter symbol will automatically appear in the symbol area of the page. Click Insert at the bottom of the window to complete the input of diameter φ.

Extended data:

The way to represent the diameter of a circle is: the Greek letter φ (phi, pronounced fa √) plus the letter representing the circle. Such as Φ o, Φ a, followed by connection =, such as Φ a = 30 mm. In drawing and engineering terminology, the diameter can be directly expressed by Φ plus a number, such as Φ 30.

Alt+ keyboard (Alt+42677)

First, the standard writing, the Greek letter PHi (shape φ, pronunciation FAI):

1, hold down the Alt key first, then enter 42677 on the keypad, and then release the ATL key to see the symbol "φ" (press the number 934 in Word and Excel spreadsheets).

2. In Word and Excel, click "Insert-Symbol-Basic Greek" and select the Greek letter PHi (shape φ, pronunciation FAI).

3. Most input methods provide the function of symbol soft keyboard. Open the Greek alphabet soft keyboard and you will find φ.

Second, the standard writing in CAD, empty set (shape? Pronunciation: pronounce fa with the Greek letter φ):

In 1, Word and Excel spreadsheets, hold down the Alt key first, then enter 8709 on the keypad, and release the ATL key to see "?" This symbol is gone. Because both word and excel are input in Unicode. Other software, such as text documents, is entered in GBK, so it cannot be entered in this way.

2. In Word and Excel, click "Insert-Symbol-Mathematical Operator" and select an empty set (shape? ), note that the character set requires Unicode.

3. Enter %%c in AutoCAD to get this character. When copying from AutoCAD to word, you need to remove the format (only keep the text when pasting), otherwise it will not be displayed because of the font.

4. To use this character in other software, you can open the special symbol of the input method and find the mathematical symbol. Generally, you can find an empty set or copy it from word, excel, cad and other software.

Note: In order to facilitate software retrieval and processing, use the Greek letter PHI (φ) as much as possible, and avoid using Cyrillic EF (Ф, similar in shape, but different in computer coding, emphasize it) and Latin with diagonal lines. See the character coding table.

References:

(Baidu Encyclopedia: Diameter Symbol)