Branching

                                             Branching Statments in C

C language executes program statements in a sequence. Sometimes we need to alter the flow of sequence of statements. This is possible using Branching statements offered by C language. They are also known as control statements. Programmer can jump from one part of the program to other with the help of such statements. 

Branching Statements in C:

• if statement: Executes a block of code if a condition is true.
• else statement: Executes a block of code if the condition in the if statement is false.
• switch statement: Selects one of multiple blocks of code to execute based on the value of an expression.

Key Concepts to learn:

• Boolean expressions: Evaluate to either true (non-zero) or false (zero).
• Control flow: The order in which statements are executed.
• Nested statements: Placing one statement inside another.

Followings are broad categories of C language Branching Statements:

1. if statement

2. if…else statement

3. nested if statement

4. switch statement

Let’s learn branching statement by executing following programs.

Sample Programs

Program to check whether entered number is odd or even.

#include<stdio.h>
int main()
{
 int number;

 printf("Enter number:");
 scanf("%d",&number);

 if(number%2 == 0)
  printf("Entered number is even.");
 else
  printf("Entered number is odd.");
 return 0;
}

 Output:

Enter number:5
Entered number is odd.

C Program to convert given number (between 1 to 5) into words using switch.

#include<stdio.h> void main () {  int number;  printf("Enter your number:");  scanf("%d",&number);  switch(number)  {   case 1 :printf("One");              break;   case 2 :printf("Two");              break;   case 3 :printf("Three");              break;   case 4 :printf("Four");              break;   case 5 :printf("Five");              break;   default :printf("Invalid number\n" );  } } Output: Enter your number:5 Five

Check:Given number is positive or not using if..else statement.

#include<stdio.h> void main() {   int number;   printf("Enter number:");   scanf("%d",&number);   if(number > 0)       printf("Number is positive.");   else       printf("Number is not positive."); } Output: Enter number:11 Number is positive.