how to jump from the if state without executing else.? [closed]

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for(开发者_运维技巧....)
  if(condition)
    printf(_);
  else
    printf();

what code will come here....

---

If I understand you correctly, you want to jump out of the if and the enclosing for loop when condition is true. You can achieve this using break:

for(....) {
  if(condition) {
    printf(_);
    break;
  }
  else
    printf();
}

Note: I added proper indentation and angle brackets to make the code cleaner.

Update after OP's comment

int isPrime = 0;

for (i = 0; i < 10 && !isPrime; i++) {
  isPrime = (16 / i == i);
}
if (isPrime)
  printf("its a prime no");
else
  printf("not a prime no.");

Disclaimer: th condition above is hardly the proper way to detect whether a given number is prime, but still this code snippet illustrates the general idiom of saving the result of an expression from a loop and inspecting it later.

---

The else code is never executed if condition is true:

if (condition)        // If this condition evaluates to true
{
    printf("Hello");  // Then this code is executed
}
else
{
    printf("World");  // If it is false then this code is executed.
}

Edit: Wrapping it in a for loop makes no difference (unless you mean want to actually exit the for loop as well?)