Dart If-else statement

In the previous section, we studied about if statements in detail. If – block is executed when the condition evaluates to true, else if the condition evaluates to false, then the else – block is executed.

This else-block is always in association with the if block.

Syntax:

if ( condition )
{
      statements ;
}
else
{
     statements ;
}

Here, condition is a test expression that evaluates to Boolean True or False.

Program

Consider the following code in Dart that explains the concept of if-else statement,

import 'dart:io';
void main( ) {
  print( " Enter an integer : " ) ;
  int? a = int.parse( stdin.readLineSync( ) ! ) ;
  print( " Enter an integer : " ) ;
  int? b = int.parse( stdin.readLineSync( ) ! ) ;
  if ( a > b ) {
    print( " A is greater than B " ) ;
  } else {
    print( " B is greater than A " ) ;
  }
}

Output

Enter an integer :
5
Enter an integer :
10
B is greater than A

Program

Consider the following code that accepts the integer value from the user and checks whether it is even or odd.

import 'dart:io';
void main( ) {
  print( " Enter an integer : " ) ;
  int? a = int.parse( stdin.readLineSync( ) ! ) ;
  if (a % 2 == 0) {
    print( " A is an even integer " ) ;
  } else {
    print( " A is an odd integer " ) ;
  }
}

Output

Enter an integer :
5
A is an odd integer
Enter an integer :
10
A is an even number