Simple If statement
print("enter value of a")
a=int(input())
if a>=0:
print("postive number")
a=int(input())
if a>=0:
print("postive number")
Output:
enter value of a
5
postive number
enter value of a
-5
Note:
- there is no else statement , so output is empty
- we can not write condition in else block
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If-else Statement
print("enter value of a")
a=int(input())
if a>=0:
print("postive number")
else:
print("negative number")
Output:
enter value of a
5
postive number
enter value of a
-3
negative number
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If-else-if Statement
print("enter a value is")
a=int(input())
print("enter b value is")
b=int(input())
if a>b:
print("a is greater than b")
elif a<b:
print("a is smaller than b")
else:
print("both are equal")
Output:
enter a value is
10
enter b value is
30
a is smaller than b
enter a value is
45
enter b value is
45
both are equal
marks = int(input("Enter the marks? "))
if marks > 85 and marks <= 100:
print("Congrats ! you scored grade A ...")
elif marks > 60 and marks <= 85:
print("You scored grade B + ...")
elif marks > 40 and marks <= 60:
print("You scored grade B ...")
elif (marks > 30 and marks <= 40):
print("You scored grade C ...")
else:
print("Sorry you are fail ?")
Output:
Enter the marks? 90
Congrats ! you scored grade A ...
Enter the marks? 45
You scored grade B ...
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Nested if
print("enter value of a:")
a=int(input())
print("enter value of b:")
b=int(input())
print("enter value of c:")
c=int(input())
if a>b:
if a>c:
print("a is big")
else:
print("c is big")
else:
if b>c:
print("b is big")
else:
print("c is big")
Output:
enter value of a:
10
enter value of b:
20
enter value of c:
15
b is big
enter value of a:
30
enter value of b:
45
enter value of c:
55
c is big
enter value of a:
100
enter value of b:
56
enter value of c:
67
a is big
