Question

     str1 = “Health”

      str2 = “Informatics”

      int1 = 4

      int2 = 6

      int3 = 0

      while int1 <= int2:

                print (int1 +1)

     str3 = str1[int2] + str2[int3]

     print (str2[int4])

     if int3 % int2 == 0:

         int2 +=1

    elif int2 % int3 == 1: ## ZeroDivisionError: int3 = 0, we can not divide by zero

    int1 += 1

Using python: Find the semantic error in this code, and please state what is wrong!

Answer 1

Solution:

Semantic error means logical errors that leads to wrong results.

In the given program there are three variables declared int1=4,int2=6,int3=0.

First semantic error is there is a while loop checking int1<=int2 it is always true i.e 4 <=6 so while loop will iterate infinitely there is no increment of int1 so that the loop will never terminate.

Next semantic Error is str3 = str1[int2] + str2[int3]

Here str1 contains the word Health whose length is 6 that means index will exist till 5 only since index of string starts with 0.

But here we are accessing str1[int2] i.e str1[6]  it gives string index out of range error.

Next semantic error is print (str2[int4]) here int4 is not declared but we are accessing with it it comes under syntax error and semantic error also.

In next lines it is just if conditions and checking so the main semantic errors in this program is infinite loop and accessing out of index characters and accessing a character with undefined index.

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