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CPP int keyword
Return to int, C++ Reserved words, C++, Reserved Words, CPP Glossary, CPP Topics
Here's an in-depth comparison of the C++ `int` keyword to its equivalent in Python, Java, C#, Kotlin, JavaScript, TypeScript, PHP, Go, Rust, Swift, Transact-SQL, and PL/SQL. This comparison will delve into the nuances of integer representation and usage across these languages, complete with code examples and documentation references, all formatted in MediaWiki syntax.
- C++
In C++, `int` is a fundamental data type used for representing 32-bit signed integers by default, though the exact size can vary based on the platform. It's a core part of the language's type system.
```cpp int a = 10; // C++ integer declaration ```
C++ documentation: s://en.cppreference.com/w/cpp/language/types(https://en.cppreference.com/w/cpp/language/types)
- Python
Python does not require explicit type declaration. Its `int` type can store integers of unlimited magnitude (as long as memory allows).
```python a = 10 # Python automatically understands this as an integer ```
Python documentation: s://docs.python.org/3/library/stdtypes.html#numeric-types-int-float-complex(https://docs.python.org/3/library/stdtypes.html#numeric-types-int-float-complex)
- Java
Java's `int` type is a 32-bit signed integer, which is part of its primitive type system.
```java int a = 10; // Java integer declaration ```
Java documentation: s://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html(https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html)
- C#
C# defines `int` as a 32-bit signed integer in its type system, similar to Java.
```csharp int a = 10; // C# integer declaration ```
C# documentation: s://docs.microsoft.com/en-us/dotnet/csharp/language-reference/builtin-types/integral-numeric-types(https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/builtin-types/integral-numeric-types)
- Kotlin
Kotlin also uses `int` to represent a 32-bit signed integer. Type inference allows omitting the type when it's clear from the context.
```kotlin var a = 10 // Kotlin understands this as an integer ```
Kotlin documentation: s://kotlinlang.org/docs/basic-types.html#numbers(https://kotlinlang.org/docs/basic-types.html#numbers)
- JavaScript
JavaScript does not have an `int` type; instead, it uses `Number` for all numeric values, which are IEEE 754 double precision floating-point.
```javascript var a = 10; // JavaScript Number type ```
JavaScript documentation: s://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#number_type(https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#number_type)
- TypeScript
TypeScript, enhancing JavaScript, also doesn't have an `int` type, using `number` for all numeric representations.
```typescript let a: number = 10; // TypeScript number type ```
TypeScript documentation: s://www.typescriptlang.org/docs/handbook/basic-types.html#number(https://www.typescriptlang.org/docs/handbook/basic-types.html#number)
- PHP
PHP dynamically determines variable types; `int` is inferred based on the context.
```php $a = 10; // PHP integer ```
PHP documentation: s://www.php.net/manual/en/language.types.integer.php(https://www.php.net/manual/en/language.types.integer.php)
- Go
Go has a type `int`, which is platform-dependent and can be either 32 or 64 bits.
```go var a int = 10 // Go integer declaration ```
Go documentation: s://golang.org/pkg/builtin/#int(https://golang.org/pkg/builtin/#int)
- Rust
Rust offers various integer types; `i32` is the default integer type, representing a 32-bit signed integer.
```rust let a: i32 = 10; // Rust integer declaration ```
Rust documentation: s://doc.rust-lang.org/book/ch03-02-data-types.html#data-types(https://doc.rust-lang.org/book/ch03-02-data-types.html#data-types)
- Swift
Swift's `Int` is platform-dependent, typically 32-bit on 32-bit platforms and 64-bit on 64-bit platforms.
```swift var a: Int = 10 // Swift integer declaration ```
Swift documentation: s://docs.swift.org/swift-book/LanguageGuide/TheBasics.html#ID320(https://docs.swift.org/swift-book/LanguageGuide/TheBasics.html#ID320)
- Transact-SQL
Transact-SQL uses `INT
` to declare a 32-bit integer.
```sql DECLARE @a INT = 10; – Transact-SQL integer declaration ```
Transact-SQL documentation: s://docs.microsoft.com/en-us/sql/t-sql/data-types/int-bigint-smallint-and-tinyint-transact-sql(https://docs.microsoft.com/en-us/sql/t-sql/data-types/int-bigint-smallint-and-tinyint-transact-sql)
- PL/SQL
PL/SQL treats `NUMBER` without precision as capable of storing integers (among other numeric types), though not explicitly an `int` type.
```plsql DECLARE
a NUMBER := 10; -- PL/SQL integer declaration```
PL/SQL documentation: s://docs.oracle.com/cd/B19306_01/server.102/b14200/sql_elements001.htm#i54330(https://docs.oracle.com/cd/B19306_01/server.102/b14200/sql_elements001.htm#i54330)
This overview shows that while most of these languages have a direct equivalent to C++'s `int`, the specifics of how they are implemented and used can vary significantly, reflecting the diversity of approaches to type systems in programming languages.
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