Truncate means making something smaller, or cutting off part of it. In computer science, the term “truncate” is often used to refer to variables or types of data, such as stings or floating-point numbers. For example, a function may truncate the decimal part of a floating-point number. If the number is 4.932 is truncated, then it becomes 4.
The important note is that the truncated concept is different from the rounded to the nearest number, which should be 5.
If the length of the string accelerates the character limit, the string can be shortened.