Merge pull request #4 from srekan/conditional-statements

Conditional statements

Author: srekan

Diff for: conditional-statements/README.md

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+# Go Programming Exercises: if else statements
+- [Program to find maximum between two numbers](max_of_two_numbers.go)
+- [Program to find maximum between two numbers using functions](max_of_two_numbers_using_functions.go)
+- [Program to find maximum between three numbers](max_of_three_numbers.go)
+- [Program to find maximum between three numbers using functions](max_of_three_numbers_using_functions.go)
+- [Program to check whether a number is negative, positive or zero](find_number_sign.go)
+- [Program to check whether a number is divisible by 5 and 11 or not](is_divisible_by_5_and_11.go)
+- [Program to check whether a number is divisible by 5 and 11 or not using boolean operators](is_divisible_by_5_and_11_using_functions_using_bool.go)
+- [Program to check whether a number is even or odd](is_even_or_odd.go)
+- [Program to check whether a year is leap year or not](is_leap_year.go)
+- [Program to input any character and check whether it is alphabet, digit or special character](is_alphabet_or_digit.go)
+- [Program to input any alphabet and check whether it is vowel or consonant](is_vowel.go)
+- [Program to check whether a character is uppercase or lowercase alphabet](is_upper_case.go)
+- [Program to input week number and print week day](print_week_day.go)
+- [Program to input week number and print week day using switch](print_week_day_using_switch.go)
+- [Program to input week number and print week day using an array](print_week_day_using_array.go)
+- [Program to input month number and print month name and number of days in that month](days_of_month.go)
+- [Program to input month number and print month name and number of days in that month using a map](days_of_month_using_map.go)
+- [Program to input angles of a triangle and check whether triangle is valid or not](is_valid_triangle.go)
+- [Program to check whether the triangle is equilateral, isosceles or scalene triangle](get_triangle_type.go)
+## To be written
+- Program to find all roots of a quadratic equation
+- Program to calculate profit or loss
+- Program to input marks of five subjects Physics, Chemistry, Biology, Mathematics and Computer. Calculate percentage and grade according to following:
+	* Percentage >= 90% : Grade A
+	* Percentage >= 80% : Grade B
+	* Percentage >= 70% : Grade C
+	* Percentage >= 60% : Grade D
+	* Percentage >= 40% : Grade E
+	* Percentage < 40% : Grade F
+- Program to input basic salary of an employee and calculate its Gross salary according to following:
+    * Basic Salary <= 10000 : HRA = 20%, DA = 80%
+    * Basic Salary <= 20000 : HRA = 25%, DA = 90%
+    * Basic Salary > 20000 : HRA = 30%, DA = 95%
+- Program to input electricity unit charges and calculate total electricity bill according to the given condition:
+    * For first 50 units Rs. 0.50/unit
+    * For next 100 units Rs. 0.75/unit
+    * For next 100 units Rs. 1.20/unit
+    * For unit above 250 Rs. 1.50/unit
+    * An additional surcharge of 20% is added to the bill

Diff for: conditional-statements/days_of_month.go

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+package main
+import "fmt"
+func main(){
+	var n int
+	fmt.Print("Enter month number(1 - 12): ")
+	fmt.Scan(&n)
+
+	switch n {
+	case 1, 3, 5, 7, 8, 10, 12:
+		fmt.Println("31 days")
+	case 2:
+		fmt.Println("28/29 days")
+	case 4, 6, 9, 11:
+		fmt.Println("30 days")
+	default:
+		fmt.Println("Please enter a valid value between 1 and 12")
+	}
+}
+
+/** Outputs
+
+$ go run days_of_month.go
+Enter month number(1 - 12): 5
+31 days
+
+$ go run days_of_month.go
+Enter month number(1 - 12): 2
+28/29 days
+
+$ go run days_of_month.go 13
+Enter month number(1 - 12): 13
+Please enter a valid value between 1 and 12
+
+*/

Diff for: conditional-statements/days_of_month_using_map.go

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+package main
+import "fmt"
+func main(){
+	type Month struct {
+		name string
+		days int
+	}
+	monthsMap := map[int]Month{
+		1: { name: "January", days: 31 },
+		2: { name: "February", days: 28 },
+		3: { name: "March", days: 31 },
+		4: { name: "April", days: 30 },
+		5: { name: "May", days: 31 },
+		6: { name: "June", days: 30 },
+		7: { name: "July", days: 31 },
+		8: { name: "August", days: 31 },
+		9: { name: "September", days: 30 },
+		10: { name: "October", days: 31 },
+		11: { name: "November", days: 30 },
+		12: { name: "December", days: 31 },
+	}
+
+	var n int
+	fmt.Print("Enter month number(1 - 12): ")
+	fmt.Scan(&n)
+
+	if monthsMap[n].name != "" {
+		fmt.Printf("%s - %d days\n", monthsMap[n].name, monthsMap[n].days)
+	} else {
+		fmt.Println("Please enter a valid value between 1 and 12")
+	}
+}
+
+/** Outputs
+
+$ go run days_of_month_using_map.go
+Enter month number(1 - 12): 6
+June - 30 days
+
+$ go run days_of_month_using_map.go
+Enter month number(1 - 12): 66
+Please enter a valid value between 1 and 12
+
+*/

Diff for: conditional-statements/find_number_sign.go

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+package main
+import "fmt"
+func main(){
+	var n int
+	fmt.Print("Enter an integer: ")
+	fmt.Scan(&n)
+
+	if(n == 0){
+		fmt.Println("Given number is zero")
+	} else if(n > 0){
+		fmt.Println("Given number is positive")
+	} else{ /* if(n < 0) // Default case*/
+		fmt.Println("Given number is negative")
+	}
+}
+/** Outputs
+
+$ go run find_number_sign.go
+Enter an integer: 10
+Given number is positive
+
+$ go run find_number_sign.go
+Enter an integer: -10
+Given number is negative
+
+$ go run find_number_sign.go
+Enter an integer: 0
+Given number is zero
+
+*/

Diff for: conditional-statements/get_triangle_type.go

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+package main
+import "fmt"
+func getTriangleType(side1, side2, side3 float64)string{
+	if(side1 == side2 && side2 == side3){
+		return "EQUILATERAL triangle"
+	}
+
+	if(side1 == side2 || side2 == side3 || side3 == side1){
+		return "ISOSCELES triangle"
+	}
+
+	return "SCALENE triangle" // this is the remaining case after the aboce two cases
+}
+func main(){
+	var side1, side2, side3 float64
+	fmt.Print("Enter first side: ")
+	fmt.Scan(&side1)
+	fmt.Print("Enter second second: ")
+	fmt.Scan(&side2)
+	fmt.Print("Enter third third: ")
+	fmt.Scan(&side3)
+
+	fmt.Println(getTriangleType(side1, side2, side3))
+}
+
+/** Output
+
+$ go run get_triangle_type.go
+Enter first side: 10
+Enter second second: 10
+Enter third third: 10
+EQUILATERAL triangle
+
+$ go run get_triangle_type.go
+Enter first side: 10
+Enter second second: 10
+Enter third third: 20
+ISOSCELES triangle
+
+$ go run get_triangle_type.go
+Enter first side: 10
+Enter second second: 20
+Enter third third: 30
+SCALENE triangle
+
+*/

Diff for: conditional-statements/is_alphabet_or_digit.go

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+/*
+ASCII codes
+0 : 48
+9 : 57
+A : 65
+B : 66
+Z : 90
+a : 97
+b : 98
+z : 122  
+*/
+package main
+import (
+	"fmt"
+	"bufio"
+	"os"
+)
+func main(){
+	reader := bufio.NewReader(os.Stdin)
+
+	fmt.Print("Enter a character: ")
+	char, _, err := reader.ReadRune()
+
+	if err != nil {
+		fmt.Println(err)
+	}
+
+	if (char >= 'a' && char <= 'z') || (char >= 'A' && char <= 'Z') {
+		fmt.Println("Given character is an alphabet")
+	} else if char >= '0' && char <= '9' {
+		fmt.Println("Given character is a digit")
+	}
+	/*
+	// Method 2: compare with ascii values
+	if (char >= 65 && char <= 122) || (char >= 97 && char <= 90) {
+		fmt.Println("Given character is an alphabet")
+	} else if char >= 48 && char <= 57 {
+		fmt.Println("Given character is a digit")
+	}
+	*/
+}
+
+/** Outputs
+
+$ go run is_alphabet_or_digit.go
+Enter a character: a
+Given character is an alphabet
+
+$ go run is_alphabet_or_digit.go
+Enter a character: G
+Given character is an alphabet
+
+$ go run is_alphabet_or_digit.go
+Enter a character: 5
+Given character is a digit
+
+*/

Diff for: conditional-statements/is_divisible_by_5_and_11.go

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+package main
+import "fmt"
+func main(){
+	var n int
+	fmt.Print("Enter a number: ")
+	fmt.Scan(&n)
+
+	if(n % 5 == 0){
+		if(n % 11 == 0){
+			fmt.Println("The given number is divisible by both 5 and 11")
+		} else {
+			fmt.Println("The given number is divisible by 5, but not 11")
+		}
+	} else {
+		if(n % 11 == 0){
+			fmt.Println("The given number is divisible by 11, but not 5")
+		} else {
+			fmt.Println("The given number is not divisible by 5 and 11")
+		}
+	}
+}
+
+/** Outputs
+
+$ go run is_divisible_by_5_and_11.go
+Enter a number: 55
+The given number is divisible by both 5 and 11
+
+$ go run is_divisible_by_5_and_11.go
+Enter a number: 22
+The given number is divisible by 11, but not 5
+
+$ go run is_divisible_by_5_and_11.go
+Enter a number: 25
+The given number is divisible by 5, but not 11
+
+$ go run is_divisible_by_5_and_11.go
+Enter a number: 13
+The given number is not divisible by 5 and 11
+
+*/

Diff for: conditional-statements/is_divisible_by_5_and_11_using_functions_using_bool.go

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+package main
+import "fmt"
+func main(){
+	var n int
+	fmt.Print("Enter a number: ")
+	fmt.Scan(&n)
+
+	if(n % 5 == 0 && n % 11 == 0){
+		fmt.Println("The given number is divisible by both 5 and 11")
+	}
+
+	if(n % 5 == 0 && n % 11 != 0){
+		fmt.Println("The given number is divisible by 5, but not 11")
+	}
+	if(n % 5 != 0 && n % 11 == 0){
+		fmt.Println("The given number is divisible by 11, but not 5")
+	}
+	
+	if(n % 5 != 0 && n % 11 != 0){
+		fmt.Println("The given number is not divisible by 5 and 11")
+	}
+}
+
+/** Outputs
+
+$ go run is_divisible_by_5_and_11.go
+Enter a number: 55
+The given number is divisible by both 5 and 11
+
+$ go run is_divisible_by_5_and_11.go
+Enter a number: 22
+The given number is divisible by 11, but not 5
+
+$ go run is_divisible_by_5_and_11.go
+Enter a number: 25
+The given number is divisible by 5, but not 11
+
+$ go run is_divisible_by_5_and_11.go
+Enter a number: 13
+The given number is not divisible by 5 and 11
+
+*/

Diff for: conditional-statements/is_even_or_odd.go

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+package main
+import "fmt"
+func main(){
+	var n int
+	fmt.Print("Enter a number: ")
+	fmt.Scan(&n)
+
+	if(n % 2 == 0){
+		fmt.Println("Given number is even")
+	} else {
+		fmt.Println("Given number is odd")
+	}
+}
+
+/** Outputs
+
+$ go run is_even_or_odd.go
+Enter a number: 2
+Given number is even
+
+$ go run is_even_or_odd.go
+Enter a number: 3
+Given number is odd
+
+$ go run is_even_or_odd.go
+Enter a number: 0
+Given number is even
+
+*/