What is the usage of calc in css3

In CSS3, the calc() function is used to dynamically calculate the length value. The parameter can be set to a mathematical expression, and the result will be the return value after the operation; any length value can use the calc() function Calculations are performed, using standard mathematical precedence rules, with the syntax "length attribute: calc (length mathematical expression)".

The operating environment of this tutorial: Windows 10 system, CSS3&&HTML5 version, Dell G3 computer.

What is the usage of calc in css3

The calc() function is used to dynamically calculate the length value.

It should be noted that a space needs to be reserved before and after the operator, for example: width: calc(100% - 10px);

Any length value can be calculated using the calc() function ;

The calc() function supports " ", "-", "*", "/" operations;

The calc() function uses standard mathematical operation priority rules;

The syntax is:

calc(expression)

expression Required, a mathematical expression, the result will be the return value after the operation.

The example is as follows:

      
  
创建一个横跨屏幕的div，div 两边有 50px 的间隙：
 
一些文本...
  

Output result:

(Learning video sharing:css video tutorial)

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