In C, test expressions are conditions or logical statements that evaluate to either true or false. They're used in control flow statements like if, while, for, etc., to determine whether certain blocks of code should execute or loops should continue iterating.

Explanation:

  Here are some examples of test expressions in C:
  1. Using Comparison Operators:
  int x = 5, y = 10;
  if (x < y) {
   // Executes if x is less than y
   } 
  2. Logical Expressions:
  int a = 3;
  int b = 7; 
  int c = 10;
   if (a > b && b < c) {
   // Executes if a is greater than b AND b is less than c
   } 
  3. Testing Equality:
  int number = 15;
   if (number == 15) { 
   // Executes if 'number' is equal to 15 
   } 
  4. Using Conditions in Loops:
  int i;
   for (i = 0; i < 10; i++) {
   // Executes 10 times until i becomes 10 
  } 
  5. Testing for Non-Zero Values:
  int value = 5; 
  if (value) { // Executes if 'value' is non-zero } 
  These expressions evaluate to either true or false, determining the flow of execution within the code based on the specified conditions.
  
 

#include 

                        int main() {
                            int x = 5, y = 10;
                        
                            if (x = y) {
                                printf("A");
                            } else {
                                printf("B");
                            }
                        
                            return 0;
                        }
                        

#include 

                      int main() {
                          int x = 5;
                      
                          if (x > 0);
                              printf("A");
                          printf("B");
                          return 0;
                      }
                      ;