Simple if else statement,nesting of if else statement & else if ladder

1. Introduction
2. Simple if else statement
3. Nesting of if else statement
4. Else if Ladder

1. Daffodil institute of it Active Learning Assignment Topic:Simple if else statement,Nesting of if else statement & Else If Ladder Prepared by : - Manimay Adhikary ( 180084 )

2. Brief flow of presentation 1. Introduction 2. Simple if else statement 3. Nesting of if else statement 4. Else if Ladder

3. The if else Statement if else statement : A control structure that executes one block of statements if a certain condition is true, and a second block of statements if it is false. We refer to each block as a branch . General syntax: if ( <test>) { < statement(s)> ; } else { < statement(s)> ; } Example: # include< stdio.h > int main() { int number; printf ("Enter an integer: "); scanf ("% d",&number );

4. Flow chart // True if remainder is 0 if ( number%2 == 0 ) printf ("%d is an even integer .",number ); else printf ("%d is an odd integer .",number ); return 0; } Output: Enter an integer: 7 7 is an odd integer

5. Nested if...else statement -The if...else statement executes two different codes depending upon whether the test expression is true or false . - Sometimes, a choice has to be made from more than 2 possibilities. -The nested if...else statement allows you to check for multiple test expressions and execute different codes for more than two conditions .

6. Syntax of nested if...else statement if (testExpression1) { // statements to be executed if testExpression1 is true } else if(testExpression2) { // statements to be executed if testExpression1 is false and testExpression2 is true } else if ( testExpression 3) { // statements to be executed if testExpression1 and testExpression2 is false and testExpression3 is true } . else { // statements to be executed if all test expressions are false }

7. Example #include < stdio.h > int main() { int number1, number2; printf ("Enter two integers: "); scanf ("%d %d", &number1, &number2); // checks if two integers are equal. if(number1 == number2) { printf ("Result: %d = %d",number1,number2); } // checks if number1 is greater than number2. else if (number1 > number2) { printf ("Result: %d > %d", number1, number2); }

8. // if both test expression is false else { printf ("Result: %d < %d",number1, number2); } return 0; } Output : Enter two integers: 12 23 Result: 12 < 23

9. Nested if else if Flow Chart if ( <test>) { < statement(s)>; } else if ( <test>) { < statement(s)>; } else if ( <test>) { < statement(s)>; }

10. The else if ladder

11. Example main () { int units, custnum ; float charges; printf ("Enter customer no. and units consumed\n"); scanf ("% d%d",&custnum,&units ); if(units <=200) charges=0.5*units ; else if(units<=400) charges=100+0.65 *(units-200); else if(units<=600) charges=230+0.8 *(units-400); else charges=390 +(units-600); printf ("\n\nCustomer no:%d Charge=%.2f\n", custnum, charges ); }

12. Thank You..