Logical operators: These operators return a boolean value by validating more than one expression. Operators are &&, ||, !
| Expression1 | Expression2 | && | || | !Expression1 | !Expression2 |
| T | T | T | T | F | F |
| T | F | F | T | F | T |
| F | T | F | T | T | F |
| F | F | F | F | T | T |
Code:
| <html> <body> <script> document.write(“true && true = ” + (true && true) + “<br/>”); document.write(“true && false = ” + (true && false) + “<br/>”); document.write(“true || true = ” + (true || true) + “<br/>”); document.write(“true || false = ” + (true || false) + “<br/>”); </script> </body> </html> |
Condition to check First Num is greater than both Second & Third Nums or Not:
| Variables: var a=?, b=?, c=?; Condition: a > b && a > c |
Condition to check the number divisible by both 3 and 5 or not:
| Variables: var n=?; Condition: n % 3 == 0 && n % 5 == 0 |
Condition to check the number is in between 30 and 50 or not:
| Variables: var n=?; Condition: n >= 30 && n <= 50 |
Condition to check the student passed in all 4 subjects or Not:
| Variables: var m1=?, m2=?, m3=?, m4=?; Condition: M1>=40 && m2>=40 && m3>=40 && m4>=40 |
Condition to check the character is Vowel or Not:
| Variables: var ch = ‘?’; Condition: ch == ‘a’ || ch == ‘e’ || ch== ‘i’ || ch==’o’ || ch==’u’ |
Condition to check the character is Upper case alphabet or not:
| Variables: var ch=’?’; Condition: ch >= ‘A’ && ch <= ‘Z’ |
Condition to check the character is Alphabet or not:
| Variables: var ch=’?’; Condition: (ch >= ‘A’ && ch <= ‘Z’) || (ch >= ‘a’ && ch <= ‘z’) |
Condition to check the 3 numbers equal or not:
| Variables: var a=?, b=?, c=?; Condition: a == b && b == c |
Condition to check any 2 numbers equal or not among the 3 numbers:
| Variables: var a=? , b=? , c=?; Condition: a==b || b==c || c=a |
Condition to check the 3 numbers are unique or not:
| Variables: var a=? , b=? , c=?; Condition: a!=b && b!=c && c!=a |