Half double crochet (hdc)
The Half Double Crochet (hdc) is a basic crochet stitch that is taller than a single crochet but shorter than a double crochet. The hdc results in a firm, yet flexible fabric.
It's a versatile stitch that is great for a variety of projects, from blankets and hats to scarves and sweaters.
Its height and density make it an excellent stitch for projects that need a little more warmth and durability, such as cozy winter hats or sturdy bags. It's also great for adding a bit of decorative flair to your crochet work, as it creates a subtle texture that can make your projects stand out.
Insert your hook into the stitch where you want to place your hdc.
Yarn over and pull up a loop.
Look after step 3
You should now have three loops on your hook.
Yarn over once more and pull trough all loops on your hook.