WRITE IN JAVA

Question $1$: Write a Java program that takes an input in feet and converts it to inches. If the input is less than $0,$ print "Invalid input," otherwise, print the equivalent length in inches.

Example:

If feet $=-3$ : Print Invalid

If feet $=6\mathrm{.}3$: Print $75$ inches

Question $2$: Take $3$ numbers as input from the user and print the biggest and the smallest numbers.

Example:

Input:

num$1=4$

num$2=3$

num$3=7$

Output:

Biggest number $=7$

Smallest number $=3$

Question $3$: Write a Java program that takes an integer number from the user and prints "Positive" if the number is greater than $0,$ "Negative" if the number is less than $0,$ and "Zero" if the number is $0.$

Example:

Input: num $=1|$ Output: Positive

Input: num $=-4|$ Output: Negative

Input: num $=0|$ Output: Zero

Question $4$: Create a Java program that assigns a grade based on the score of a student. If the score is above $90,$ print $"$A$".$ If the score is between $80$ and $90($inclusive$),$ print $"$B$".$ If the score is between $70$ and $79($inclusive$),$ print $"$C$".$ If the score is between $60$ and $69($inclusive$),$ print $"$D$".$ Otherwise, print $"$F$".$

Example:

Input: score $=92|$ Output: A

Input: score $=85|$ Output: B

Input: score $=76|$ Output: C

Input: score $=65|$ Output: D

Input: score $=59|$ Output: F

Question $5$: Develop a Java program that acts as a simple calculator. The program takes three inputs: two double values a and b$,$ and a char operator. Depending on the value of operator $(\text{'}+\text{'},\text{'}-\text{'},\text{'}*\text{'},\text{'}/\text{'}),$ the program should print the result of the operation between a and b$.$ If the operator is not one of the specified characters, print "Invalid operator".

Example:

Input: a $=5,$ b $=3,$ operator $=\text{'}+\text{'}|$ Output: $8\mathrm{.}0$

Input: a $=10,$ b $=2,$ operator $=\text{'}/\text{'}|$ Output: $5\mathrm{.}0$

Input: a $=8,$ b $=2,$ operator $=\text{'}\%\text{'}|$ Output: Invalid operator

Question $6$: Create a Java program for a retail store that applies discounts based on the purchase amount. If the purchase amount is greater than $$1000,$ apply a $10\%$ discount. For amounts between $$500$ and $$1000($inclusive$),$ apply a $5\%$ discount. Otherwise, no discount is applied. Print the final amount after applying the discount.

Example:

Input: purchaseAmount $=1500|$ Output: Final Amount: $$1350\mathrm{.}0$

Input: purchaseAmount $=750|$ Output: Final Amount: $$712\mathrm{.}5$

Input: purchaseAmount $=400|$ Output: Final Amount: $$400\mathrm{.}0$

Question

$7$: Develop a Java program that acts as a simple calculator. The program takes three inputs: two double values a and b$,$ and a char operator. Depending on the value of operator $(\text{'}+\text{'},\text{'}-\text{'},\text{'}*\text{'},\text{'}/\text{'}),$ the program should print the result of the operation between a and b$.$ If the operator is not one of the specified characters, print "Invalid operator".

Example:

Input: a $=5,$ b $=3,$ operator $=\text{'}+\text{'}|$ Output: $8\mathrm{.}0$

Input: a $=10,$ b $=2,$ operator $=\text{'}/\text{'}|$ Output: $5\mathrm{.}0$

Input: a $=8,$ b $=2,$ operator $=\text{'}\%\text{'}|$ Output: Invalid operator