Reading a Text File Character by Character

Let’s learn how to read a text file one character at a time.

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How to read a text file character by character
Coding example
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How to read a text file character by character

In this lesson, we’ll learn how to read a text file character by character, which is a pretty rare requirement unless we want to develop a text editor. We take each line that we read and split it using a for loop with range, which returns two values. We discard the first, which is the location of the current character in the line variable, and we use the second. However, that value is a rune, which means that we have to convert it into a character using string().

Coding example

The implementation of charByChar() is as follows:

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Course Introduction

Introduction to Go

Basic Go Data Types

Composite Data Types

Reflection and Interfaces

Go Packages and Functions

Telling a UNIX System What to Do

Go Concurrency

Building Web Services

Working with TCP/IP and WebSocket

Working with REST APIs

Code Testing and Profiling

Working with gRPC

Go Generics

Conclusion

Appendix A—Go Garbage Collector

Reading a Text File Character by Character

How to read a text file character by character

Coding example