What is the difference between pass by value and pass by reference? Answer: We can pass the parameters in a function in two different ways in C programming. Pass by value: In this approach we pass the copy of actual variables in function as a parameter. Hence any modification on parameters inside the function will not reflect in the actual variable. For example: #include<stdio.h> int main() { int a=5,b=10; swap(a,b); printf("%d %d",a,b); return 0; } void swap(int a,int b) { int temp; temp =a; a=b; b=temp; } Output: 5 10 Pass by reference: In this approach we pass the memory address of actual variables in function as a parameter. Hence any modification on parameters inside the function will reflect in the actual variable. For example: #incude<stdio.h> int main() { int a=5,b=10; swap(&a,&b); printf("%d %d",a,b); return 0; } void swap(in