Node.js Buffer.writeUInt32LE() Method Last Updated : 13 Oct, 2021 Comments Improve Suggest changes Like Article Like Report The Buffer.writeUInt32LE() method is used to write specified bytes using Little endian format to the buffer object. The value contains a valid unassigned 32-bit integer. Syntax: Buffer.writeUInt32LE( value, offset ) Parameters: This method accept two parameters as mentioned above and described below: value: It is an integer value and that is to be written into the buffer. offset: It is an integer value and it represents the number of bytes to skip before starting to write and the value of offset lies within the range 0 to buffer.length - 4. Its default value is 0. Return value: It returns an integer value offset plus number of bytes written. Example 1: javascript // Node.js program to demonstrate the // Buffer.writeUInt32LE() Method // Allocate a buffer const buf = Buffer.allocUnsafe(4); // Write the buffer element in LE format buf.writeUInt32LE(0xabcdabcd, 0); // Display the buffer list console.log(buf); // Write the buffer element in LE format buf.writeUInt32LE(0xfacedcba, 0); // Display the buffer list console.log(buf); Output: <Buffer cd ab cd ab> <Buffer ba dc ce fa> Example 2: javascript // Node.js program to demonstrate the // Buffer.writeUInt32LE() Method // Allocate a buffer const buf = Buffer.allocUnsafe(4); // Write the buffer element in LE format buf.writeUInt32LE(0xabce, 0); // Display the buffer list console.log(buf); // Write the buffer element in LE format buf.writeUInt32LE(0xeab, 0); // Display the buffer list console.log(buf); Output: <Buffer ce ab 00 00> <Buffer ab 0e 00 00> Note: The above program will compile and run by using the node index.js command. Reference: https://nodejs.org/api/buffer.html#buffer_buf_writeuint32le_value_offset Comment More infoAdvertise with us B bestharadhakrishna Follow Improve Article Tags : Technical Scripter Web Technologies Node.js Node.js-Buffer-module Similar Reads Node.js Buffer.copy() Method Buffer is a temporary memory storage that stores the data when it is being moved from one place to another. It is like an array of integers. The Buffer.copy() method simply copies all the values from the input buffer to another buffer. Syntax:buffer.copy( target, targetStart, sourceStart, sourceEnd 2 min read Node.js Buffer.includes() Method Buffer is a temporary memory storage which stores the data when it is being moved from one place to another. It is like an array of integers. The Buffer.includes() method checks whether the provided value is present or included in the buffer or not. 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