How Can I Read an Integer from Standard Input in Go Using fmt.Scanf?

Reading an Integer from Standard Input using fmt.Scanf in Go

The question arises when we need to obtain an integer value from the user through the standard input in Golang. This article explores the usage of the fmt.Scanf function for this purpose, presenting its implementation and outlining alternative approaches.

Utilizing fmt.Scanf

The fmt.Scanf function provides an efficient way to read formatted input from the standard input. For reading an integer, the following code snippet can be used:

Here, the code uses the format specifier %d to indicate that the user input should be interpreted as an integer. The &i syntax is used to pass the address of the i variable, ensuring that the function can modify its value.

Alternative Solutions

If for any reason, fmt.Scanf is not suitable, there are alternative approaches to read a single integer from standard input:

• io.Scan: Allows for reading a single line of input, which can then be converted to an integer using the strconv.Atoi function.
• bufio.Scanner: Provides a more advanced interface for text processing, enabling the reading of integers using its Scan() function.

Conclusion

Understanding how to read an integer from standard input in Golang is essential for various programming scenarios. The fmt.Scanf function is a convenient solution for this task, but alternatives are available depending on specific requirements.

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