1. Method 1: Create a word document and input it with the help of a formula editor. The specific steps are as follows:

(1) Open a new Word document and find the ""button on the right side of the toolbar, as shown below:

(2) Click after finding it, and the input box of the formula editor will appear. Find the button as shown on the right side of the display bar:

(3) After clicking, a drop-down letter option will appear. Find "λ" and click.

2. Method 2: Using the special characters in the symbol library of sogou input method, the specific steps are as follows:

(1) Switch the sogou input method to the Chinese input state, and click the "Special Symbol" option;

(2) In the special symbol box, click the "Greece/Latin" button, find the "λ" on the right, and click.

3、:

"λ" is a special character that is often used in mathematics and physics. The formula editor in word can input standardized mathematical character symbols conveniently and quickly, including up, subscript, power, root sign and so on. The use of formula editor needs more practice.