When it is required to check if a date is valid or not, and print the incremented date if it is a valid date, the ‘if’ condition is used.
Below is a demonstration of the same −
Example
my_date = input("Enter a date : ")
dd,mm,yy = my_date.split('/')
dd=int(dd)
mm=int(mm)
yy=int(yy)
if(mm==1 or mm==3 or mm==5 or mm==7 or mm==8 or mm==10 or mm==12):
max_val = 31
elif(mm==4 or mm==6 or mm==9 or mm==11):
max_val = 30
elif(yy%4==0 and yy%100!=0 or yy%400==0):
max_val = 29
else:
max_val = 28
if(mm<1 or mm>12 or dd<1 or dd> max_val):
print("The date is invalid")
elif(dd==max_val and mm!=12):
dd=1
mm=mm+1
print("The incremented date is : ",dd,mm,yy)
elif(dd==31 and mm==12):
dd=1
mm=1
yy=yy+1
print("The incremented date is : ",dd,mm,yy)
else:
dd=dd+1
print("The incremented date is : ",dd,mm,yy)Output
Enter a date : 5/07/2021 The incremented date is : 6 7 2021
Explanation
The date is entered as user input.
It is split based on ‘/’ symbol.
The date, month and year are converted into integers.
An ‘if’ condition is specified to see if the month is even or odd.
Another ‘if’ condition is specified to check the year.
Based on the results of the ‘if’ condition, the month is incremented.
This is displayed on the console.