Python:

# Method 1: Using enumerate() function
with open('file.txt') as file:
for line_number, line in enumerate(file, start=1):
    print(f'Line {line_number}: {line}')
# Method 2: Using a counter variable
line_number = 1
with open('file.txt') as file:
for line in file:
    print(f'Line {line_number}: {line}')
    line_number += 1

Java:

// Method 1: Using BufferedReader and LineNumberReader
try (BufferedReader reader = new BufferedReader(new FileReader("file.txt"))) {
String line;
int line_number = 1;
while ((line = reader.readLine()) != null) {
    System.out.println("Line " + line_number + ": " + line);
    line_number++;
}
}
// Method 2: Using Scanner
try (Scanner scanner = new Scanner(new File("file.txt"))) {
int line_number = 1;
while (scanner.hasNextLine()) {
    String line = scanner.nextLine();
    System.out.println("Line " + line_number + ": " + line);
    line_number++;
}
}

JavaScript:

// Method 1: Using readline module
const readline = require('readline');
const fs = require('fs');
const file = readline.createInterface({
input: fs.createReadStream('file.txt'),
output: process.stdout,
terminal: false
});
let line_number = 1;
file.on('line', function(line) {
console.log(`Line ${line_number}: ${line}`);
line_number++;
});
// Method 2: Using fs module
const fs = require('fs');
const content = fs.readFileSync('file.txt', 'utf-8');
const lines = content.split('\n');
let line_number = 1;
for (const line of lines) {
console.log(`Line ${line_number}: ${line}`);
line_number++;
}