as long as/if

[wowenglish1]

I wonder if there is a subtle difference in the meaning between "1" and "2".
1. As long as it doesn't rain, I am going to play tennis after work.
2. If it doesn't rain, I am going to play tennis after work.

 

[The French]

I wonder if there is a subtle difference in the meaning between "1" and "2".
1. As long as it doesn't rain, I am going to play tennis after work.
2. If it doesn't rain, I am going to play tennis after work.

Hello, I am not a teacher,

but in my mind your sentences seem to have the same meaning. Give me opinion about the difference between the these two sentences, if you see one.

Cordially,

 

[bhaisahab]

I wonder if there is a subtle difference in the meaning between "1" and "2".
1. As long as it doesn't rain, I am going to play tennis after work.
2. If it doesn't rain, I am going to play tennis after work.

In that context they mean the same.