how to use if(variable=1) in c code example

Example 1: if statement in c

#include <studio.h>
int main()
{
  if (logic goes here)
  {
    CODE
  }
  else if (logic)
  {
    CODE
  }
  else{
    CODE
  }
  return 0
}

Example 2: and statement c

if(thing > a && thong == 1){
	continue...
}