if else in a for loop [closed]

Question

this code Works

#include <cs50.h>
#include <stdio.h>
#include <string.h>

int main(void)

{
int k;
 printf("write as trin\n");
 string s= GetString();
 for (int i=0; i<strlen(s);++i)
 {  
  if(s[i]+13>122 || s[i]+13>90)
  k=s[i]-109;
  {
  printf("%c\n",'a'+(k-1));
  }

 }}

when i add the else no..

#include <cs50.h>
#include <stdio.h>
#include <string.h>

int main(void)

{
int k;
 printf("write as trin\n");
 string s= GetString();
 for (int i=0; i<strlen(s);++i)
 {  
  if(s[i]+13>122 || s[i]+13>90);
  k=s[i]-109;
  {
  printf("%c\n",'a'+(k-1));
  }
  else 
  {
  printf("%c",s[i]+13);
  }

 }}

Answer 1

You've got a semicolon at the end of the if in your second example. That ends the statement. You need to remove that. You should also put your curly braces around the entire if statement:

  if(s[i]+13>122 || s[i]+13>90)
  {
      k=s[i]-109;
      printf("%c\n",'a'+(k-1));
  }
  else 
  {
      printf("%c",s[i]+13);
  }