The `justify-content` property is instrumental in determining the position of flex items along the main axis. Its default value is `flex-start`.
```css
justify-content: flex-start | flex-end | center | space-between | space-around;
```


Let's consider each case on practice. We will play with the list of cards.

## flex-start
Default value, which makes all the items be at the start of the main axis.

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## flex-end
All items are at the axis end.

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## space-around
It distributes all the items evenly along the main axis with a bit of space left at either end.

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## space-between
It is very similar to `space-around` except that it doesn't leave any space at the axis on both ends.

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Which of the following values for the `justify-content` property will align flex items along the center of a flex container?

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Justifying Content Horizontally in Flexbox

flex-start

flex-end

center

space-around