Hi,
Answer => <span>Inode
Good Lessons </span>
Answer:
Explanation:
iname=input("Enter the file name: ")
inputfile=open(iname,'r')
lines=[]
for line in inputfile:
lines.append(line)
inputfile.close()
print("The file has ",len(lines)," lines")
while True:
linenumber=int(input("Enter the line number or 0 to quit: "))
if linenumber==0:
break
elif linenumber > len(lines):
print("Error: line number must be less than ", len(lines))
else:
print(linenumber, " : ", lines[linenumber - 1])
Answer:
The answer to this question is given below in the explanation section.
Explanation:
The for-loop given in the question is:
for ( j = 0; j < 10; j++ )
{
appendItem (myList, aNumber); //this loop append a number to a list myList
}
This loop starts from J variable's value zero and when J's value is less than 10, the loop iterate through its body until J's value becomes greater or equal to 10. As J's value exceed nine, the loop will get terminated.
So this loop repeats 10 times its loop body, at the 11th time, the condition becomes false and the loop will get terminated.
Answer:
The solution code is written in Python:
- def square(num):
- if type(num).__name__ == 'int':
- sq_num = num * num
- return sq_num
- else:
- return "Invalid input"
-
- print(square(5))
- print(square("Test"))
Explanation:
To ensure only certain type of operation can be applied on a input value, we can check the data type of the input value. For example, we define a function and name it as <em>square</em> which take one input number, <em>num </em>(Line 1).
Before the <em>num</em> can be squared, it goes through a validation mechanism in by setting an if condition (Line 2) to check if the data type of the input number is an integer,<em> int.</em> If so, the<em> num </em>will only be squared otherwise it return an error message (Line 6).
We can test our function by passing value of 5 and "Test" string. We will get program output:
25
Invalid input
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