Decision Making Structure In C

Sunday, 24 November 2013

Decision Making Structure In C

Decision making structures allows the programmer to specify one or more conditions to be evaluated or tested by the compiler or , along with a statement or set of statements to be executed if the condition is true, and other statements to be executed if the condition is false.

C Programming

Most of the programming languages follows the same decision making structure:

Decision Making Structure

In C programming language any non-zero and non-null values is true, and if it is either zero or null, then it is assumed as false value.

C programming language has following types of decision making statements.

Statement Description

1.if statement It consists of a boolean condition followed by one or more statements.

2.if...else statement It can be followed by an optional else statement, which executes when the condition is false.

3.nested if statements if or else if statement inside another if or else if statement(s).

4.switch statement It allows a variable to be tested for equality against a list of values.

5.nested switch statements You can use one switch statement inside another switch statement(s).

6.The ? : Operator:

Example of conditional operator

Exp1 ? Exp2 : Exp3;

Where Exp1, Exp2, and Exp3 are expressions.

The value of a ? expression is determined like this:first Exp1 is evaluated. If Exp1 is true, then Exp2 is evaluated otherwise then Exp3 is evaluated and its value becomes the value of the expression.