C++ LANGUAGE IF STATEMENT PAGE 58

COMPUTER LANGUAGES HTML,C,C++.JAVA,.NET AND MULTIMEDIA basics and programs click home button

C++ LANGUAGE IF STATEMENT

If Statement 

An if statement consists of a boolean expression 
followed by one or more statements. 

Syntax 


The syntax of an if statement in C++ is: 
if(boolean_expression) 
{ 
   // statement(s) will execute if the boolean expression is true 
} 
If the boolean expression evaluates to true, then the block 
of code inside the if statement will be executed. If boolean 
expression evaluates to false, then the first set of code after 
the end of the if statement (after the closing curly brace) will be executed. 

 
Example 
#include <iostream> 
using namespace std; 
  
int main () 
{ 
   // local variable declaration: 
   int a = 10; 
  
   // check the boolean condition 
   if( a < 20 ) 
   { 
       // if condition is true then print the following 
       cout << "a is less than 20;" << endl; 
   } 
   cout << "value of a is : " << a << endl; 
  
   return 0; 
} 
 
 
When the above code is compiled and executed, 
it produces the following result: 
a is less than 20; 
value of a is : 10