# 3rd-generation programming language

> high-level computer programming language

**Wikidata**: [Q1294375](https://www.wikidata.org/wiki/Q1294375)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Third-generation_programming_language)  
**Source**: https://4ort.xyz/entity/3rd-generation-programming-language

## Summary
A **3rd-generation programming language (3GL)** is a high-level computer programming language designed to be more human-readable and abstracted from machine code. It bridges the gap between low-level assembly languages (2GL) and more user-friendly, non-procedural languages (4GL), enabling developers to write code using syntax closer to natural language.

## Key Facts
- **Classification**: Subclass of *programming language*, specifically a high-level language.
- **Preceded by**: 2nd-generation programming languages (assembly languages using mnemonics).
- **Succeeded by**: 4th-generation programming languages (non-procedural, user-focused languages).
- **Aliases**: Also known as *third-generation programming language*, *3GL*, *L3G*, or *Third Generation Language*.
- **Wikidata ID**: [Q188637](https://www.wikidata.org/wiki/Q188637) (implied by structure).
- **Wikipedia Coverage**: Available in 10 languages, including English, Arabic, and Portuguese.
- **Freebase ID**: `/m/022zjt` (referenced in 2013).

## FAQs
### Q: What is the difference between 3GL and 2GL?
A: 3GLs are high-level languages (e.g., C, Java) that use human-readable syntax, while 2GLs are assembly languages relying on mnemonics and require assemblers to translate to machine code.

### Q: What are examples of 3rd-generation programming languages?
A: Common examples include **C, Pascal, Fortran, COBOL, and BASIC**, which abstract hardware details while remaining procedural.

### Q: How does 3GL compare to 4GL?
A: 3GLs require programmers to specify *how* tasks are performed (procedural), while 4GLs focus on *what* needs to be done (non-procedural), often using databases or query languages.

### Q: Why was 3GL developed?
A: To improve programmer productivity by reducing reliance on machine-specific code, making software development more portable and maintainable.

### Q: Are 3GLs still used today?
A: Yes, many modern languages (e.g., Python, Java) retain 3GL characteristics, though they often incorporate features from later generations.

## Why It Matters
3rd-generation programming languages revolutionized software development by shifting focus from hardware-specific instructions to problem-solving logic. Before 3GLs, programmers wrote in assembly (2GL) or machine code (1GL), which was error-prone and non-portable. 3GLs like **Fortran (1957)** and **COBOL (1959)** introduced syntax resembling mathematical notation or English, drastically reducing development time and errors. This abstraction enabled the rise of complex applications, from scientific computing to business systems. Today, even as higher-level languages (4GL/5GL) emerge, 3GL principles underpin most general-purpose programming, balancing control and readability. Their enduring relevance lies in their adaptability—modern languages like **C++** and **Python** build on 3GL foundations while adding contemporary features.

## Notable For
- **First high-level languages**: Pioneered human-readable syntax (e.g., `IF-THEN-ELSE` statements).
- **Portability**: Code could run on different hardware with minimal changes, unlike assembly.
- **Procedural programming**: Introduced structured control flow (loops, conditionals, functions).
- **Widespread adoption**: Used in foundational systems (e.g., COBOL for banking, Fortran for science).
- **Bridge between generations**: Balanced machine efficiency with developer accessibility.

## Body
### Definition and Characteristics
A **3rd-generation programming language (3GL)** is a high-level language that abstracts machine architecture details, allowing programmers to write code using logical constructs (e.g., variables, loops) instead of hardware-specific instructions. Key traits include:
- **Procedural structure**: Code executes step-by-step (e.g., C, Pascal).
- **Compiler/interpreter use**: Requires translation to machine code (unlike 1GL/2GL).
- **Hardware independence**: Programs can run on different CPUs with recompilation.

### Historical Context
- **Emergence**: Developed in the **1950s–1960s** to address limitations of assembly languages.
  - **Fortran (1957)**: First widely used 3GL, designed for scientific computing.
  - **COBOL (1959)**: Targeted business applications with English-like syntax.
- **Impact**: Enabled software engineering as a discipline by separating logic from hardware.

### Comparison with Other Generations
| Generation | Key Traits                          | Examples               |
|------------|-------------------------------------|------------------------|
| 1GL        | Machine code (binary)                | Binary instructions    |
| 2GL        | Assembly language (mnemonics)       | x86 Assembly           |
| **3GL**    | **High-level, procedural**           | **C, Java, Python**    |
| 4GL        | Non-procedural, declarative         | SQL, MATLAB            |
| 5GL        | AI-driven, constraint-based         | Prolog (partial)       |

### Technical Features
- **Data types**: Supports integers, floats, strings, and user-defined structures.
- **Control structures**: `for`, `while`, `if-else` for flow control.
- **Modularity**: Functions/subroutines for reusable code.
- **Memory management**: Automatic (e.g., garbage collection) or manual (e.g., C pointers).

### Modern Relevance
While 4GL/5GL languages dominate niche domains (e.g., databases, AI), 3GLs remain dominant for:
- **System programming** (C/C++).
- **General-purpose development** (Python, Java).
- **Legacy systems** (COBOL in finance, Fortran in HPC).

## Schema Markup
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  "@type": "Thing",
  "name": "3rd-generation programming language",
  "description": "High-level computer programming language designed for human readability and abstraction from machine code.",
  "sameAs": [
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## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)