Node.js Buffer.writeUInt32BE() Method Last Updated : 13 Oct, 2021 Comments Improve Suggest changes Like Article Like Report The Buffer.writeUInt32BE() method is used to write a number to an instance of the Buffer class. This value is written at the specified offset and in the big endian format. Syntax: buffer.writeUInt32BE(value, offset) Parameters: This method accept two parameters as mentioned above and described below: Value: This parameter holds the number to write. It should be a valid unsigned 32 bit integer. Also, behavior is not defined for invalid value. Offset: This parameter holds the number of bytes to skip. The value must be in range [0, buffer.length - 4]. It is optional parameter and the default value is zero. Return value: This parameter returns the sum of number of bytes written and the offset. Example 1: javascript // Node.js program to demonstrate the // Buffer.writeUInt32BE method // Creating a buffer of size 8 const buffer = Buffer.allocUnsafe(8); console.log(buffer); // Return value is 4 buffer.writeUInt32BE(0xabcdabcd, 0); console.log(buffer); // Return value is 8 buffer.writeUInt32BE(0xabcdabcd, 4); console.log(buffer); Output: <Buffer 6c 69 63 65 00 00 00 00> <Buffer ab cd ab cd 00 00 00 00> <Buffer ab cd ab cd ab cd ab cd> Example 2: javascript // Node.js program to demonstrate the // Buffer.writeUInt32BE method // Creating a buffer of size 8 const buffer = Buffer.allocUnsafe(8); console.log(buffer); // Out of range error will be thrown buffer.writeUInt32BE(0xabcdabcd, 5); Output: <Buffer b0 f1 67 fc 63 7f 00 00> Thrown: RangeError [ERR_OUT_OF_RANGE] ........ Reference: https://nodejs.org/api/buffer.html#buffer_buf_readint32be_offset Comment More infoAdvertise with us D dev10kalra Follow Improve Article Tags : 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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