In order to overcome the shortcomings of low-level languages, john baker created the first high-level computer language FORTRAN in 1950s.
It is very close to the natural language and mathematical language that people are used to. Operators and expressions used in programs are easy to understand and use. FORTRAN plays an important role in the fields of numerical value, science and engineering calculation with its unique functions.
The low-level language era of programming training class;
The era of low-level languages (1946- 1953) mainly includes machine languages and assembly languages called "gobbledygook".
Computer work is based on binary. Fundamentally speaking, computers can only recognize and accept instructions consisting of 0 and 1. The collection of these instructions is the machine language of the computer. The disadvantages of machine language include: difficult to learn, difficult to write, difficult to remember, difficult to look up, difficult to modify and difficult to popularize and use. So only a few computer professionals could write computer programs in the early days.
Assembly language is difficult to understand because of machine language, so Mockley and others began to think of using mnemonics instead of 0, 1 code, so assembly language appeared.