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Lecture7relationalandlogicaloperators 110823181038-phpapp02
The document discusses relational and logical operators in programming. [1] Relational operators like ==, !=, <, >, <=, >= are used to compare two values and return a true or false result. [2] Logical operators like &&, ||, and ! are used to combine multiple conditions. [3] Relational operators are commonly used with if/else conditional statements to test conditions, while logical operators allow combining conditions using AND, OR, and NOT operations.
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Lecture7relationalandlogicaloperators 110823181038-phpapp02
- 1. Relational and LogicalOperators www.eshikshak.co.in
- 2. Relational Operators ● Comparetwo values Result 1 True 0 False ● Six Operators, No space between the operator Operator Meaning == Equal to != Not Equal to < Less than > Greater than <= Less than or equal to >= Greater than or equal to www.eshikshak. co.in
- 3. Relational Operators ● Ifarithmetic expression on either side of relational operator, than arithmetic expression will be evaluated first and then the results are compared. ● All of these operators are known as binary operator, as they required two expressions as operands. ● They are used with condition statements www.eshikshak. co.in
- 4. Example ● if (value == 0 ) ●{ ● printf (“The value you entered was zero.n”) ; ● printf(“Please try again.n”) ; ●} ● else ●{ ● printf (“Value = %d.n”, value) ; ●} www.eshikshak. co.in
- 5. Relational Operators Expression Meaning Result 5 == 3 5 is equal to 3 0 5 != 3 5 is not equal to 3 1 5>3 5 is greater than 3 1 5<3 5 is less than 3 0 5 is greater than or equal to 5 >= 3 1 3 5 <= 3 5 is less than or equal to 3 0 www.eshikshak. co.in
- 6. Logical Operator ● Sometimeswe need to test multiple conditions in order to make a decision. ● Logical operators are used for combining simple conditions to make complex conditions. www.eshikshak. co.in
- 7. Logical Operator Operator Meaning && AND || OR ! NOT www.eshikshak. co.in
- 8. && (Logical AND) ●(expression1 && expression2) ● expression1 expression2 Overall Result True True True (non-zero) (non-zero) (non-zero) True False False (non-zero) (zero) (zero) False True False (zero) (non-zero) (zero) False False False (zero) (zero) (zero) www.eshikshak. co.in
- 9. && (Logical AND) Expression Result A = ( 5 != 4 ) && ( 3 + 6 == 9 ) A=1 A = ( 5 == 4 ) && ( 3 + 6 == 9 ) A=0 A = ( 5 == 5 ) && ( 3 + 5 == 9 ) A=0 A = ( 5 == 4 ) && ( 3 + 5 == 9 ) A=0 www.eshikshak. co.in
- 10. || (Logical OR) ●(expression1 || expression2) expression1 expression2 Overall Result True True True (non-zero) (non-zero) (non-zero) True False True (non-zero) (zero) (non-zero) False True True (zero) (non-zero) (non-zero) False False False (zero) (zero) (zero) www.eshikshak. co.in
- 11. || (Logical OR) Expression Result A = ( 5 != 4 ) || ( 3 + 6 == 9 ) A=1 A = ( 5 == 4 ) || ( 3 + 6 == 9 ) A=0 A = ( 5 == 5 ) || ( 3 + 5 == 9 ) A=0 A = ( 5 == 4 ) || ( 3 + 5 == 9 ) A=1 www.eshikshak. co.in
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