What is the role of switch statement in c plus plus?

Switch is an alternative to using a long sequence of if...else if... statements where each conditional expression is essentially the same, evaluating to the same data type but with different values.

For instance:

if(x==1) statement_1;

else if(x==2) statement_2;

else if(x==3) statement_3;

else statement_4;

The above can also be written:

switch(x)

{

case(1): statement_1; break;

case(2): statement_2; break;

case(3): statement_3; break;

default: statement_4;

}

Most would regard the second version as more readable as there's only one conditional expression to evaluate.