f = open('sample.txt', 'w')
f.write("こんにちは２")
f.close()



f = open('sample.txt', 'w', encoding='utf-8')



f = open('sample.txt')

f.readline() 
f.readline() 
f.readline() 
f.readline() 

f.close()



[Python]
f = open('sample.txt', 'r')

for line in f:
    print(line.strip())

f.close()



try:
    f = open('sample.txt', 'r')
    for line in f:
        print(line.strip())
finally:
    f.close()



with open('sample.txt', 'w') as f:
    f.write("こんにちは２")



const fs = require('fs');

fs.readFile('sample.txt', 'utf8', (err, str) => {
    if (err) throw err;
    console.log(str);
});



const fs = require('fs');

fs.readFile('sample.txt', 'utf8', (err, str) => {
    if (err) throw err;
    console.log("読み込んだよ");
});
console.log("readFileの実行が終わったよ");



const fs = require('fs');

cosnt str = fs.readFileSync('sample.txt', 'utf8');
console.log(str);



const fs = require('fs');

fs.writeFile('sample.txt', '書き込みたい文字列', (err) => {
    if (err) throw err;
});



const fs = require('fs');

fs.writeFileSync('sample.txt', '書き込みたい文字列');



const fs = require('fs');

fs.appendFile('sample.txt', '追記したい文字列', (err) => {
    if (err) throw err;
});



const fs = require('fs');

fs.appendFileSync('sample.txt', '追記したい文字列');

