Decision Making

In C, decision-making is typically achieved using conditional statements, such as:

1.if statement :The 'if' statement allows you to execute a block of code if a specified condition is true.

              
        #include <stdio.h>            
         int main() { 
            int num = 10; 
    
            if (num > 0) { 
            printf("The number is positive.\n"); 
            } 
    
            return 0; 
            } 

                
            

2.if-else statementThe 'if-else' statement allows you to execute one block of code if a condition is true and another block of code if the condition is false.

    
    #include <stdio.h>
     int main() { 
     int num = -5; 
                
    if (num > 0) { 
    printf("The number is positive.\n"); 
    } else { 
    printf("The number is non-positive.\n");
    }            
    return 0;
     } 

    
    

3.if-else if-else statement :The 'if-else if-else' statement allows you to check multiple conditions and execute different blocks of code accordingly.

            
            #include <stdio.h>
                int main() {
                int num = 0;
                if (num > 0) {
                printf("The number is positive.\n");
                } else if (num < 0){ 
                 printf("The number is negative.\n"); 
                } else { 
                printf("The number is zero.\n"); 
                } 
                return 0;
                } 


                
            

4.switch statement :The 'switch' statement allows you to choose among multiple cases based on the value of an expression

            
                 #include <stdio.h>
                 int main() { 
                    char grade = 'B'; 
        
                    switch (grade) { 
                    case 'A': 
                    printf("Excellent!\n");
                    break; 
                    case 'B':
                    printf("Good!\n");
                    break; 
                    case 'C': 
                    printf("Average.\n");
                    break; 
                    default: 
                    printf("Invalid grade.\n"); 
                    } 
        
                    return 0;
                    }