When is it more appropriate to use while statement than for statement in C language?

Problems that can be handled by a for loop can certainly be replaced by a while loop, but the reverse is not necessarily true. When you can't predict the number of loop executions in advance, you can only use the while loop. For example, when reading any text file, you want to use loops to read one line at a time. You can't determine the number of lines in the file in advance, so you can't use the for loop, you can only use the while loop to read the end of the file.