Switch-case statements: These are a substitute for long if statements that compare a variable to several integral values
- The switch statement is a multiway branch statement. It provides an easy way to dispatch execution to different parts of code based on the value of the expression.
- Switch is a control statement that allows a value to change control of execution.
Syntax:
switch (n) { case 1: // code to be executed if n = 1; break; case 2: // code to be executed if n = 2; break; default: // code to be executed if // n doesn't match any cases }
Nested-Switch Statement: Nested-Switch statements refers to Switch statements inside of another Switch Statements. Syntax:
switch(n) { // code to be executed if n = 1; case 1: // Nested switch switch(num) { // code to be executed if num = 10 case 10: statement 1; break; // code to be executed if num = 20 case 20: statement 2; break; // code to be executed if num = 30 case 30: statement 3; break; // code to be executed if n // doesn't match any cases default: } break; // code to be executed if n = 2; case 2: statement 2; break; // code to be executed if n = 3; case 3: statement 3; break; // code to be executed if n doesn't match any cases default: }
Example:
CPP
// Following is a simple program to demonstrate // syntax of Nested Switch Statements. #include <iostream> using namespace std;
int main()
{ int x = 1, y = 2;
// Outer Switch
switch (x) {
// If x == 1
case 1:
// Nested Switch
switch (y) {
// If y == 2
case 2:
cout << "Choice is 2";
break ;
// If y == 3
case 3:
cout << "Choice is 3";
break ;
}
break ;
// If x == 4
case 4:
cout << "Choice is 4";
break ;
// If x == 5
case 5:
cout << "Choice is 5";
break ;
default :
cout << "Choice is other than 1, 2 3, 4, or 5";
}
return 0;
} |
Output:
Choice is 2
Recommended Articles