Why Does fmt.Scanln in Go Cause \'Expected Newline\' Error?

fmt.Scanln Unexpected Newline Error

In Go, the fmt.Scanln function reads a line of text from standard input and parses it into a specified variable. However, users may encounter the error "Scan: expected newline" while using fmt.Scanln. Understanding the reason for this error is crucial.

fmt.Scanln differs from the C getline function in that it parses text until a newline character is encountered, which marks the end of the line. Unlike getline, fmt.Scanln expects the input to have a newline at the end, and any input without a terminating newline will trigger an error.

To resolve this issue, ensure that the input has a newline at the end of the line. Additionally, you can consider using the bufio.Reader and its ReadString method to read lines of text, allowing for more customization and flexibility in handling input.

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