Swift Program List, Check your swift Program Logic, Check Your String Logic Basic Program WAP to calculate the difference of two dates in the year, a date should be assigned on DDMMYYYY  12052016 13062019 o/p  2019-2016  3 WAP to calculate the sum of all digits in date of birth? WAP to Convert feet to inch and inch to feet? WAP to convert km to meter? WAP to convert decimal to binary? WAP to calculate basic, ta, da, comm, pf,  HRA, Leave, number of leave will be entered by the users? WAP to display the middle number is a three-digit number?  a 145,154,451    WAP to calculate Square and Cube of any assigned number? WAP to calculate electricity bill where unit price, total consumption, the extra load will be entered by the users? WAP to calculate Simple Interest where rate and time will be constant and the principal will be an integer? WAP to calculate the area of a triangle, circle, and rectangle in the same program where the value of pi, the base...