This topic is about D Programming – Nested if Statement.
It is always legal in D programming to nest if-else statements, which means you can use one if or else if statement inside another if or else if statement(s).
Syntax
The syntax for a nested if statement is as follows −
if( boolean_expression 1) {
/* Executes when the boolean expression 1 is true */
if(boolean_expression 2) {
/* Executes when the boolean expression 2 is true */
}
}
You can nest else if…else in the similar way as you have nested if statement.
Example
import std.stdio;
int main () {
/* local variable definition */
int a = 100;
int b = 200;
/* check the boolean condition */
if( a == 100 ) {
/* if condition is true then check the following */
if( b == 200 ) {
/* if condition is true then print the following */
writefln("Value of a is 100 and b is 200" );
}
}
writefln("Exact value of a is : %d", a );
writefln("Exact value of b is : %d", b );
return 0;
}
When the above code is compiled and executed, it produces the following result −
Value of a is 100 and b is 200 Exact value of a is : 100 Exact value of b is : 200
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