How do you use `calc()` in CSS

The `calc()` function in CSS allows you to perform calculations to set CSS property values. It can combine different units such as percentages, pixels, and ems. This is particularly useful for responsive design and fluid layouts.

Here’s an example of how to use `calc()` to set the width of an element to be 50% of its parent's width minus 20 pixels:

.example { width: calc(50% - 20px); }

css calc responsive design fluid layouts css calculations

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