To format the string we have ‘%’ symbol which has to be used before the different operator. How to Format String in Lua?Īs we already discussed format string is a function in Lua, it is used to format the string that’s why it is called a format string in Lua. In the coming section, we will discuss more the internal working of the string.format() method in Lua for beginners. Let’s explore one more example where we will make use of the third argument.As you can see in the above line of code you can pass the variable name which will print the value. ExampleĬonsider the example shown below − _, y = string.find(s,'world') There might be scenarios where we would want to use only one of these indexes and in those cases, we can simply write the code as follows. Notice that in the above code, the i identifier is the starting index where the pattern that we search was found, the j identifier is the ending index of that pattern.

Let’s consider a very simple example of the string.find() function where we will try to find a simple pattern in a given string. In the above syntax, I mentioned both the types of the string.find() function that we can make use of. Indexstart, indexend = string.find(s,”pattern”,indexstart + z) Syntax indexstart, indexend = string.find(s,”pattern”) It is mainly used where there are chances that multiple times a same pattern will occur in the same string. This parameter is useful when we want to process all the indices where a given pattern appears. There’s a third argument also, the third argument is an index that tells where in the subject string to start the search. The string.find() function is used to find a specific pattern in a given string, it normally takes two arguments, the first argument being the string in which the pattern we are trying to search, and the second argument is the pattern that we are trying to search. In place of the POSIX pattern matching, the Lua’s implementation of pattern matching takes less than 500 lines.

Lua doesn’t use the POSIX regular expression for pattern matching, as the implementation of the same takes 4,000 lines of code, which is actually bigger than all the Lua standard libraries together. String.find() is one of the most powerful library functions that is present inside the string library.

Lua string fscanf