Conditionals (Switch)
Switch Statement in Programming
The switch statement is a great replacement for long if-else construct. For example, if x is equal to
one, then we simply print "x is one". If-else construct is a good replacement that is the switch
construct. It first checks if x is equal to 1, 2, and 3, then simply the default will get evaluated and
the statement corresponding to that default. That statement is optional. It is not necessary to add
this default statement. If there is no break after this function, subsequent expressions will also get
evaluated until we reach the next break.
Important Points to Remember:
Subsequent expressions must have a break immediately after them, otherwise, the next
expression will also be evaluated.Last expression needs to have a break written immediately after
it.Only integer constants or integer constant expressions in case labels are allowed. Float value is
not allowed as a constant value in case label.You are not allowed to add duplicate cases.Default
can be placed anywhere inside switch. It will still get evaluated if no match is found.Examples:
For example, the default of this construct is a statement that means the default. The previous
statement, if x does not have a default, it is a default. It means that the expression is that it is not.
The expression is an expression that does not contain the default's expression. There is a default.
For the first time, it will not contain a statement. For the future of this construction, it will be the
first or not to contain the first.
For example, this program will produce an error: "case label does not produce an integer
constant". Although, macros are allowed. Therefore, this program will not produce an error and it
will produce an output "number is two".
Default can be placed anywhere inside switch. It will still get evaluated if no match is found. For
example, it is not always necessary to put default immediately after the cases. It can be put at the
top, it will always get evaluated after checking all the cases. Please remember this point.
Switch Statement in Programming
The switch statement is a great replacement for long if-else construct. For example, if x is equal to
one, then we simply print "x is one". If-else construct is a good replacement that is the switch
construct. It first checks if x is equal to 1, 2, and 3, then simply the default will get evaluated and
the statement corresponding to that default. That statement is optional. It is not necessary to add
this default statement. If there is no break after this function, subsequent expressions will also get
evaluated until we reach the next break.
Important Points to Remember:
Subsequent expressions must have a break immediately after them, otherwise, the next
expression will also be evaluated.Last expression needs to have a break written immediately after
it.Only integer constants or integer constant expressions in case labels are allowed. Float value is
not allowed as a constant value in case label.You are not allowed to add duplicate cases.Default
can be placed anywhere inside switch. It will still get evaluated if no match is found.Examples:
For example, the default of this construct is a statement that means the default. The previous
statement, if x does not have a default, it is a default. It means that the expression is that it is not.
The expression is an expression that does not contain the default's expression. There is a default.
For the first time, it will not contain a statement. For the future of this construction, it will be the
first or not to contain the first.
For example, this program will produce an error: "case label does not produce an integer
constant". Although, macros are allowed. Therefore, this program will not produce an error and it
will produce an output "number is two".
Default can be placed anywhere inside switch. It will still get evaluated if no match is found. For
example, it is not always necessary to put default immediately after the cases. It can be put at the
top, it will always get evaluated after checking all the cases. Please remember this point.
