计算行尾的出现次数

text = "This is a sample text with multiple lines.\nThis is the second line.\nThis is the third line."
count = text.count('\n')
print(f"The text contains {count} line breaks.")

String text = "This is a sample text with multiple lines.\nThis is the second line.\nThis is the third line.";
int count = 0;
for (int i = 0; i< text.length(); i++) {
    if (text.charAt(i) == '\n') {
        count++;
    }
}
System.out.println("The text contains " + count + " line breaks.");

const text = "This is a sample text with multiple lines.\nThis is the second line.\nThis is the third line.";
const count = (text.match(/\n/g) || []).length;
console.log(`The text contains ${count} line breaks.`);

string text = "This is a sample text with multiple lines.\nThis is the second line.\nThis is the third line.";
int count = text.Count(c => c == '\n');
Console.WriteLine($"The text contains {count} line breaks.");

$text = "This is a sample text with multiple lines.\nThis is the second line.\nThis is the third line.";
$count = substr_count($text, "\n");
echo "The text contains $count line breaks.";