"""def differ(x,y):#function header
    return(x-y)     #function body
a=15
b=10
cal=differ(a,b)
print(cal)
"""
"""def func():
    for i in range(4):
        print(i)
print("first line")
func()
print("last line")"""

"""def differ(x,y=5):
    return(x-y)
a=15
b=10
cal=differ(b)
print(cal)"""

"""gnum=10
print("global variable",gnum)
def func(num):
    print("inside function ",num)
    lnum1=50
    print("inside function",lnum1)
    print("inside golbal variable",gnum)
    #gnum=100
    print("inside global variable",gnum)
func(20)
print("outside global variable",gnum)"""



