High Level Programming Languages
Computer Science: OCR A Level, topic 2.4.1
High-Level Languages
Most computer languages are written in high-level programming languages.
High-Level Languages
- High-level languages (HLLs) include most programming languages such as Python, C++ and Java.
- High-level languages are made of human-readable statements that make it easier for us to program.
- High-level languages are portable, which means that they can be run on many different types of hardware.
What does a HLL look like?
- Commands in a high-level language look very like English. For example:
- print()
- SELECT * FROM users;
Why don't we always use HLLs?
- Computers can only process instructions in the form of binary numbers.
- We use special software called a translator to convert our HLL source code into an executable binary file.
Test yourself on High Level Programming Languages
What does it mean for a language to be portable?
Which of these statements look like high-level language?
Why don't we always use high-level languages?