js remove decimal places from number

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const number = 1.234;

const result = Math.trunc(number);

console.log(result); // 1


// More examples:
console.log(Math.trunc(0.01)); // 0
console.log(Math.trunc(1.99)); // 1
console.log(Math.trunc(2.50)); // 2


// Warning: Math.trunc() was introduced in ES2015.

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const number = 1.234;

const result = parseInt(number);

console.log(result); // 1


// More examples:
console.log(parseInt(0.01)); // 0
console.log(parseInt(1.99)); // 1
console.log(parseInt(2.50)); // 2


// Warning: the above solution is not optimal, because it converts number to string and parse omitting dot end next characters.

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const number = 1.234;

const result = Math.round(number); // round the number to remove decimal places

console.log(result); // 1


// More examples:
console.log(Math.round(0.01)); // 0
console.log(Math.round(0.49)); // 0
console.log(Math.round(0.50)); // 1

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const number = 1.234;

const result = number.toFixed();

console.log(result); // 1


// More examples:
console.log(number.toFixed(1)); // 1.2
console.log(number.toFixed(2)); // 1.23
console.log(number.toFixed(3)); // 1.234

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const number = 1.234;

const result = number << 0;

console.log(result); // 1

// More examples:
console.log(0.01 << 0); // 0
console.log(1.99 << 0); // 1
console.log(2.50 << 0); // 2