php - What can a for loop be used for?

Question

Many functions in PHP are implemented using for loops. For example, string conversion problems, calculating the number of executions, etc. I feel that the for loop is very useful and can solve many underlying problems. Can any expert summarize the use of for loops in programming?

Answer 1

In fact, instead of asking what the for loop can do, it is better to ask what the loop can do in programming:
http://www.cnblogs.com/swiftm...

http://www.jianshu.com/p/7b28...

Answer 2

Without loops and recursion, there is no program to write.
Looping is to do those repetitive tasks for you, and the biggest advantage of computers over people is looping. If there is no looping, the mobile phones and computers around you can be thrown away! -->Joke, without loops, how could there be computers and mobile phones? !