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In CSS3, you can use the "/" operator to set the division operation of the calc() function. This function is used to dynamically calculate the length value. The parameter can be set to a mathematical expression, and the result will be the calculated value. The return value, the syntax is "length attribute: calc (dividend/divisor)"; a space must be reserved before and after the "/" operator.
The operating environment of this tutorial: Windows 10 system, CSS3&&HTML5 version, Dell G3 computer.
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 must be a mathematical expression, and the result will be the return value after the operation.
Examples are as follows:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>123</title>
<style>
input {
padding: 2px;
display: block;
width: calc(100% - 1em);
}
#formbox {
width: calc(100% / 6);
border: 1px solid black;
padding: 4px;
}
</style>
</head>
<body>
<form>
<div id="formbox">
<label>Type something:</label>
<input type="text">
</div>
</form>
</body>
</html>Output results;
(Learning video sharing: css video tutorial)
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