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Conditional If-Else Statement with Example in c language

To overcome the disadvantage of if statement, in computer programming the if-else statement is introduced. It is a two way decision statement which executes either first statement (or block of statements) or second statement (or block of statements) based on the condition.

For the true part if takes care and for the false part else takes care. The syntax of if-else statement along with equivalent flow chart is shown below:

if (condition)
 statement 1 or (block of statement 1)
 statement 2 or (block of statement 2)
Conditional If-Else Statement with Example: Turbo C

According to Flowchart, compiler will first check the condition. If the condition is true, the right side of statement(s) will execute otherwise left side of statement(s) will execute. For example 

Program to check whether the number is even or odd: Let num is the given number. After dividing num by 2, if the remainder is zero, then the given number num is even otherwise, given number num is odd. The equivalent statement can be written as:

if (num%2==0)
    Write: “Number is Even”
    Write: “Number is odd”
[End of if]


Step 1: [Read the number to check]
              Read: NUM
Step 2: [Check the number]
                    Write: ‘Number is Even’
           Write: ‘Number is Odd;
    End of if
Step 3:  Exit

The C program to perform the algorithm:

   int num;
   printf(“Enter an integer number here:”);
      printf(“The number num %d is EVEN”,num);
      printf(“The number num %d is ODD”,num);

Nested-If statement


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Memory representation of Linked List

             In memory the linked list is stored in scattered cells (locations).The memory for each node is allocated dynamically means as and when required. So the Linked List can increase as per the user wish and the size is not fixed, it can vary.

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      Suppose next node is allocated at an address 506, so the list becomes,

  Suppose next node is allocated with an address with an address 10,s the list become,

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 In the above representation the data stored in the linked list is “INDIA”, the information part of each node contains one character. The external pointer root points to first node’s address 1005. The link part of the node containing information I contains 1007, the address of next node. The last node …