By default the instructions in a program are executed sequentially. Many a times, we want a set of instructions to be executed in one situation, and an entirely different set of instructions to be executed in another situation. This kind of situation is dealt in C programs using a decision control instruction.
The general form of a typical decision making structure is,
A decision control instruction can be implemented in C using:
if statement: An if statement consists of a boolean expression followed by one or more statements.
if-else statement: An if statement can be followed by an optional else statement, which executes when the Boolean expression is false.
else-if statement: An if statement can be followed by an optional else-if statement, which evaluates another Boolean expression.
nested if statements: You can use one if or else if statement inside another if or else if statement(s).
switch statement: A switch statement allows a variable to be tested for equality against a list of values.
Nested switch statement: You can use one switch statement inside another switch statement(s).
Conditional operator statement: It can be used to replace if-else statement.
The general form of a typical decision making structure is,
- Check condition
- If condition is true, execute conditional code. If condition is false, skip executing conditional code.
A decision control instruction can be implemented in C using:
if statement: An if statement consists of a boolean expression followed by one or more statements.
if-else statement: An if statement can be followed by an optional else statement, which executes when the Boolean expression is false.
else-if statement: An if statement can be followed by an optional else-if statement, which evaluates another Boolean expression.
nested if statements: You can use one if or else if statement inside another if or else if statement(s).
switch statement: A switch statement allows a variable to be tested for equality against a list of values.
Nested switch statement: You can use one switch statement inside another switch statement(s).
Conditional operator statement: It can be used to replace if-else statement.
Related topics:
Overview of Statements in C | The if Statement in C | The if-else Statement in C | The else-if Statement in C | Nested if-else Statement in C | Forms of if Statement in C | Switch Statement in C | Conditional Operator Statement in C | The null Statement in C
List of topics: C Programming
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