eval() function

eval():

Ex1:

a=eval(“10+20+30”)

print(a)

output: 60

Ex2:

>>> a=eval(input("enter any expression"))

enter any expression10+2*3/4

>>> print(a)

11.5

>>> 

Note:

1.   First input() reads the expression i.e 10+2*3/4 in the form of string.

Then the statement looks like this:

a=eval(“10+2*3/4”)

2.   Now eval() evaluates the expression i.e 11.5 and stores into left hand side variable a.

i.e a=11.5

3. now we can print by using print().

1Q: If we omit the eval() in above ex2 program:

>>> a=input("enter any expression")

enter any expression10+2*3/4

>>> print(a)

10+2*3/4

>>> 

Definition: eval the function take a string and evaluate the result.

Related video: https://www.youtube.com/watch?v=-AJntqLTi94&feature=youtu.be

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