Java Programs Bank

1. Basics

1. Write program to print the k th digit from last. [ Sample input 23617 and k=4 output 3. ]
2. Write a program to print first digit. [ Sample input 23516, output 2. ]
3. Write program to print the second digit. [ Sample input 23516, output is 3. ]
4. Write program to find sum of all digits. [ Sample input 23617, output 2+3+6+1+7=19.]
5. Write program, which will find sum of product to consecutive digits. [ Sample input is 23145 the output is 2x3 + 3x1 + 1x4 + 4x5 = 33. ]
6. Write program, which reads two number (assume that both have same number of digits). The program outputs the sum of product of corresponding digits.
   [ Sample Input 327 and 539, output 3x5+2x3+7x9=84. ]
7. Write program to print positional values of digits. [ Sample Input 21463, output 3, 60, 400, 1000 and 20000. ]
8. Write program to find sum of even digits. [ Sample input 23617, output 2+6=8. ]
9. Write program to find number of digits. [ Sample input 423 output 3, Input 21151 output 5. ]
10. Write program to find number of even digits. [ Sample input 423 outpu 2, input 21151 output 1. ]
11. Write program to print the last even digit. [ Sample input 23613, output 6. ] [Hint:while (x%2 ≠ 0) x=x/10]
12. Program to print the digit immediately before the last even digit. [ Sample input 23613, output 3. ]
13. Write program to print the digit immediately after the last even digit.[ Sample input 23613, output 1. ]
14. Write program to print the last digit, which is multiple of 3. [ Smaple input 23617, output 6. ]
15. Write program to print the second last even digit. [Sample input 23863, output 8. ]
16. Write program, which finds the sum of numbers formed by consecutive digits. [Sample input 2415 output 24+41+15=80. ]
17. Find sum of numbers formed by exchanging consecutive digits. [ Sample input 2415, output 42+14+51=107.]