Decision making and Branching
Decision making
Decision making is a procedure of executing one or more
statement(s) depending on the truthfulness / falsity of one or more statement.
DECISION MAKING:
1)
Branching: one or more statement(s) will be
executed only once.(using if…else, switch…case, goto…label)
2)
Looping: Statements will be executed for several
times.
Use of if else:
1)
By using only ‘if’ –
if(condition)
{
Statements;
}
This is also known as unidirectional branching.
2)
By using ‘if … else’ –
if(condition)
{
Statements; //if the condition is
true
}
else
{
Statements; //if the condition is
false
}
Flowchart of ‘if…else’ statement:
This is known as bidirectional branching.
3)
By using ‘if…else…if…else’
When multiconditional branching has been to be
implemented, we use ‘if…else if…else’ construct.
Let, n conditions c1,c2,c3…upto Cn are given.
if(C1)
{
Statements;
}
else if(C2)
{
Statements;
}
else if(C3)
{
Statements;
}
.
.
.
else // Cn will automatically
considered as true when C1,C2…,Cn-1 has //become false
{
Statements;
}
4)
By using nested if …else
