How to check if a file exists in golang

Go language detects whether the file exists. First create a FileInfo. If no error is reported, then check whether it is a directory through IsDir():

finfo, err := os.Stat("filename.txt")
if err != nil {
    // no such file or dir
    return
}
if finfo.IsDir() {
    // it's a file
} else {
    // it's a directory
}

golang determines the file or file The method to determine whether the folder exists is to use the error value returned by the os.Stat() function:

If the error returned is nil, it means that the file or folder exists.

If the returned error type is judged to be true using os.IsNotExist(), it means that the file or folder does not exist.

If the error returned is of other types, it is not sure whether it exists.

For more golang knowledge, please pay attention to the golang tutorial column.

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