Understanding Simple For Loop Code in C [closed]

by

So,

int main()
{
   int x=1;           // line 1
   for (;x<=10;x++);  // line 2
   printf("%d\n",x);  // line 3
   return 0;          // line 4
}

Line 1 initializes x to 1.

Line 2 keeps increasing x by 1 until it reaches 11. The first semicolon indicates “don’t do anything before starting the loop”, x<=10 indicates keep going until x > 10 (so when x = 11) and x++ means increase x by 1 each time. If x >= 11, this line gets basically skipped because x is already greater than 10.

Line 3 prints out x to the command line (in this case, x = 11 if x started out less than 11 or just x if x started at >= 11 due to the previous line)

Line 4 means the program was successful, exit the program.

More Related Contents:

  1. C: Why is counter not resetting to 0 in for loop [closed]
  2. What is my C code not printing # in staircase pattern, this is from hackerrank, I did not pass all test cases, but i can't point out why?
  3. How many times will “Hello World” be printed?
  4. I need help understanding this code in C [closed]
  5. optimized sum of an array of doubles in C [duplicate]
  6. Variable redeclaration in c in loop and outside loop?
  7. What is the difference between ++i and i++?
  8. Why does the order of the loops affect performance when iterating over a 2D array?
  9. For vs. while in C programming?
  10. Effect of semicolon after ‘for’ loop
  11. C: for loop int initial declaration
  12. Which ordering of nested loops for iterating over a 2D array is more efficient [duplicate]
  13. What is the full “for” loop syntax in C?
  14. How do I fix “for loop initial declaration used outside C99 mode” GCC error?
  15. What does a ‘for’ loop without curly braces do?
  16. Two semicolons inside a for-loop parentheses
  17. C for loop indexing: is forward-indexing faster in new CPUs?
  18. When implementing an infinite loop, is there a difference in using while(1) vs for(;;) vs goto (in C)?
  19. What’s the best way to do a reverse ‘for’ loop with an unsigned index?
  20. Why is int rather than unsigned int used for C and C++ for loops?
  21. C For loop skips first iteration and bogus number from loop scanf
  22. Why is this happening with the sizeof operator when comparing with a negative number? [duplicate]
  23. abnormal behavior of scanf [duplicate]
  24. Split string in C every white space
  25. read line by line in the most efficient way *platform specific*
  26. Why are LIB files beasts of such a duplicitous nature?
  27. Is it possible to allocate array inside function and return it using reference?
  28. Where to find the complete definition of off_t type?
  29. C11 in GCC?
  30. Can a “container_of” macro ever be strictly-conforming?

Leave a Comment