What does step size mean?

1, one of the track and field terms. The distance between two adjacent feet when walking or running;

2. A term in a programming language that allows a numerical value to be added with a certain number (i.e. step size) in each operation to repeatedly perform the operation;

3. In the simplex optimization method, the distance of the simplex is pushed forward every time;

4. Buchang Group was established on August 28th, 1993. It is a well-known domestic high-tech health industry group integrating medical research, production, sales, diagnosis and treatment services, education and network, with more than ten thousand employees/kloc-0. Headquartered in Xi 'an, the Group has set up branches in Beijing, Shanghai and Guangdong, and branches in Shandong, Hebei and other major provinces in China.