Compare the use of switch statement with the use of nested if-else statement.

If-else statement:  When there are many conditional statements that may all evaluate to true, but we require only one if statement's body to implement. We can use an "else if" statement following an if statement and its body; that way, if the first statement is right, the "else if" will be ignored, but if the if statement is wrong, it will then check the condition for the else if statement.

Switch case statements are a substitute for long if statements that compare a variable to various "integral" values ("integral" values are easily values that can be expressed as an integer, like the value of a char).The value of the variable given into switch is compared to the value following every of the cases, and when single value matches the value of the variable, the computer continues implementing the program from that point. The condition of a switch statement is a value.