C

c if else if

if (<condition>) {
	<code>
} else if (<condition>) {
	<code>
} else {
	<code>
}

/* example */
int money = 50;
if (money < 15) {
	go_home();
} else if (money >= 600) {
	buy_all();
} else {
	buy_tickets(money / 15);
}

/* You can chain together as many else ifs as you want. But if there are
too many it will make the code hard to understand. In that case I would 
recommend trying other solutions. */

c ifdef

//INCLUDING BUILT-IN LIBRARIES...
#include <stdio.h>
#include <stdlib.h>
//PRE-DEFINE CONSTANT VALUES...
#define MAXNUM -12    //defining an integer
#define PI 3.1415     //defining a float
#define END "

		Program has ended!!
"   //defining a string
//PRE-DEFINING CONSTANT OPERATIONS...
#define ADD(a, b, c) (a + b + c)    //Operation that will add its 3 parameters

int main(){
    //using other definitions to check if the current device is Windows or UNIX
    #ifdef _WIN32   
        printf("
Windows Operating System Detected
");
    #elif linux
        printf("
UNIX Operating System Detected
");
    #else
        printf("
Operating System could NOT be identified!
");
    #endif
    
    printf("
Using pre-defined values and operations: ");
    printf("
 • MAXNUM: %d",MAXNUM);       //using pre-defined integer
    printf("
 • PI: %f",PI);               //using pre-defined float
    printf("
 • ADD(): %.2f",ADD(2,5,99.5));   //using pre-defined function

    printf(END);    //using pre-defined string
    return 0;
}

c if statement

if(raining == 0 || (windSpeed > 15 && temperature < 10))// ** missing if statement **
  {
    printf("Stay indoors.
");
  }
  else
  {
    printf("You can go outside.
");
  }
  return 0;
}

c if statment

if ( TRUE ) {
    /* Execute these statements if TRUE */
}
else {
    /* Execute these statements if FALSE */
}

c if-else

if ( condition to be checked) {

   Statements-if-condition-true ;

}

else{

statements-if-condition-false ;

}

C if...else Statement

if (test expression) {
    // run code if test expression is true
}
else {
    // run code if test expression is false
}

else if statement in c

// C program to illustrate nested-if statement
#include <stdio.h>
 
int main() {
    int i = 20;
  
    if (i == 10)
        printf("i is 10");
    else if (i == 15)
        printf("i is 15");
    else if (i == 20)
        printf("i is 20");
    else
        printf("i is not present");
}

C if Statement

if (test expression) 
{
   // code
}