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Get to Know about Decision Making and branching Statements in Detail: C Language


A statement (also known as instruction) is the smallest element of any programming language. A statement or instruction is used to inform the computer to perform an action, when a program is executed. A statement can be used to set values of variables, alter the values of a variables, accept the input, manipulate the data and display the data. Each statement in C language must be terminated by a semicolon “;”.

The expression such as “a + b”, “c = 20”, “printf()” may become statements when they are terminated by a semicolon as shown below:

a + b;                 /* statement 1 */
c = 20;                /* statement 2 */
printf();            /* statement 3 */

A statement can be simple statement (discussed above) or can be compound statement. The set of statements enclosed within a pair of curly braces such as “{“and “}” is considered as a compound statement. For example, the following compound statement computes and display the sum of two values.
  Num1 = 15;                                   
  Num2 = 35;                                   
  Sum = Num1 + Num2;                           
  printf(“The sum of Num1 %d and Num2 %d = %d”,Num1,Num2,Sum);   
This compound statement can be treated as a single statement. Note that in a compound statement ‘}’ must not end with semicolon. So, all the operations like arithmetic, assignment, control structures and input/output function calls are considered as statements. Now, let us see “What are control statements? What are the types of the control statements?”

Sequential Statements with FlowChart and Example


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Binary Search Linear Search Works only on sorted items. such as  1,2,3,4,5,6  etc
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Memory representation of Linked List Data Structures in C Language

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.

               Suppose first node of linked list is allocated with an address 1008. Its graphical representation looks like the figure shown below:

      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,

The other way to represent the linked list is as shown below:

 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 …