Migrate from Java

Overview of Python:

Key Differences:

Concept Java Python
Type System Statically typed (e.g., int, String) Dynamically typed (types inferred at runtime)
Compilation Compile into bytecode Interpreted line by line
Curly Braces Used to define blocks {} Indentation (4 spaces or tab) defines blocks;
colons (:) indicate the start of controlled blocks (loops, functions, conditionals)
Semicolons Required at the end of statements Not required
Main Method public static void main(String[] args) No main method needed

Variables and Data Types

In Java:

int number = 10;
String message = "Hello, World!";

In Python:

# Infer: Integer
number  = 10
# Infer: String
message = "Hello, World!"

Java requires explicit data type declarations, while Python dynamically infers the type based on the value assigned.

Comments

In Java:

// Single-line comment
/* 
Multi-line
comment 
*/

In Python:

# Single-line comment
'''
Multi-line 
comment
'''

Conditionals (if-else)

In Java:

if (x > 10) {
    System.out.println("x > 10");
} else if (x > 5) {
    System.out.println("x > 5");
} else {
    System.out.println("x < 5");
}

In Python:

if x > 10:
    print("x > 10")
elif x >5:
    print("x > 5")
else:
    print("x < 5")