What is Kotlin programming language? Why should we use Kotlin Programming language? History of Kotlin What are Kotlin's features Why should we use Kotlin over Java

1. What’s Kotlin and Why?
By Pouya Heydari
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2. History
• Made by JetBrains
• First appeared in 2011
• First stable release in 2016
• Free
• Open source
• Kotlinlang.org
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3. Interoperable with Java
• 100% compatibility with Java code in both directions
• Backward compatibility with previous versions (such as Java 1.6,
1.7)
• Easy convert Java code to Kotlin
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4. Statically typed
• Developer defines the variable type at compile time
• Val number : Int = 0
• Int number = 0;
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5. Type inference
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• Val number = 10
• Val name = “Pouya”
• Val bool = true
• Val char = ‘H’

6. Concise syntax
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7. OOP
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8. Functional
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9. Data classes
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10. Extension Functions
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11. Null Safety
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12. Ranges
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• 1..100
• ‘A’..’Z’

13. And lots of other features
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• Delegation
• Inline functions
• Higher order functions
• Lambdas
• Coroutines
• When
• Smart casting
• Default function parameter value
• Named parameter in functions