A half double crochet (hdc) is a basic crochet stitch that is slightly taller than a single crochet stitch and shorter than a double crochet stitch. To make a half double crochet stitch, you start by doing a yarn over, then insert your hook into the designated stitch, yarn over again, and draw the yarn through the stitch. Finally, yarn over and draw through all the loops on the hook. The half double crochet stitch is commonly used in various crochet projects such as baby blankets, pillows, scarves, and sweaters. It creates a solid fabric without holes and is suitable for both rows and rounds. The process of making a half double crochet stitch is similar to single crochet, with the addition of one extra yarn over at the beginning. It is considered a beginner-friendly stitch and is easy to learn and work with.
In summary, a half double crochet stitch is a fundamental crochet stitch that is taller than a single crochet and shorter than a double crochet. It is widely used in crochet projects and is considered beginner-friendly.