Decision making structures require that the programmer specify one or more conditions to be evaluated or tested by the program. It should be along with a statement or statements to be executed if the condition is determined to be true, and optionally, other statements to be executed if the condition is determined to be false.
If statement
It takes an expression in parenthesis and a statement or block of statements. If the expression is true then the statement or block of statements gets executed otherwise these statements are skipped.
// syntax for if statement
if (condition)
{
do something;
}
If …else statement
An if statement can be followed by an optional else statement, which executes when the expression is false.
// syntax for If …else statement
if (condition)
{
do something;
} else
{
do something;
}
switch case statement
Similar to the if statements, switch...case controls the flow of programs by allowing the programmers to specify different codes that should be executed in various conditions
// syntax for switch case statement
switch (variable)
{
case label: { // statements
break;
}
case labe2: {
// statements
break;
}
}