if-else statement in C# full Explanation
In C#, the if-else statement is used to
conditionally execute blocks of code based on certain conditions. It allows you
to control the flow of your program based on the evaluation of a Boolean
expression. Here's a full explanation of Different if-else statements in C#:
1.
If Statement:
v The
simplest form of the if statement consists of the `if` keyword followed by a
Boolean expression enclosed in parentheses. If the condition evaluates to true,
the code block associated with the if statement is executed.
v Example:
int num = 10;
if (num > 0)
{
Console.WriteLine("The number is
positive.");
}
2.
If-else Statement:
v The
if-else statement adds an additional code block, called the else block, which
is executed when the condition of the if statement evaluates to false.
v Example:
int num = -5;
if (num > 0)
{
Console.WriteLine("The number is
positive.");
}
else
{
Console.WriteLine("The number is
non-positive.");
}
3.
If-else if Ladder:
v An
if-else if ladder consists of multiple if-else statements chained together,
where each else if statement introduces a new condition to be evaluated.
v The
conditions are checked in order, and the block associated with the first
condition that evaluates to true is executed. If none of the conditions are
true, the else block is executed (if present).
v Example:
int num = 10;
if (num < 0)
{
Console.WriteLine("The number is
negative.");
}
else if (num > 0)
{
Console.WriteLine("The number is
positive.");
}
else
{
Console.WriteLine("The number is
zero.");
}
4.
Nested if-else Statements:
v Nested
if-else statements are if-else statements that are placed inside the code block
of another if or else statement.
v They
allow you to create more complex conditional structures by checking multiple
conditions and executing Different code blocks accordingly.
v Example:
int num = 10;
if (num >= 0)
{
if (num == 0)
{
Console.WriteLine("The number
is zero.");
}
else
{
Console.WriteLine("The number
is positive.");
}
}
else
{
Console.WriteLine("The number is
negative.");
}
The if-else statement and its variations are essential for controlling the flow of execution in your C# programs. They allow you to make decisions based on conditions and execute specific blocks of code accordingly. By utilizing if-else statements, you can create dynamic and flexible behavior in your applications.
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